Dual! Parallel Lun-Lun Monogatari

EP1 - Life Sympathy

Kazuki can see what no one else can: a parallel world where giant robots battle and destroy the city. Mitsuki introduces Kazuki to her father Ken Sanada. He is a college professor that tinkers in high tech quantum physics in his basement during his spare time. Ken believes he's found the bridge between these parallel worlds and tests Kazuki to learn why he's the only one who can see it. The quantum portal machine is accidentally activated by Mitsuki and Kazuki is sent to the alternate world. Kazuki does not realize he's in the alternate world at first until robots almost step on him. When the Hartzenen robot falls in front of him during a battle, the injured female pilot stumbles out and collapses into Kazuki's arms. Kazuki is forced to activate the robot and enter the fight himself.

EP2 - My Home

Kazuki goes to an empty store to buy medicine for the injured pilot, but the UN forces pick up the pilot and Hartzenen before he returns. Finding the pilot (whose name is Yayoi) missing, Kazuki searches through empty streets. Soon people begin to return to the city and Kazuki goes to his house, but none of his things are there and his parents don't know him. Soldiers, led by Mitsuki, take Kazuki into custody and bring him to Headquarters. Ken Sanada of this world greets him, then explains that he (Kazuki) does not exist in this world and Mitsuki is from his own world, but she arrived a month earlier. Ken Sanada is the UN leader of the Global Defense Force and the world is at war with the Rara army led by a fellow scientist named Hiroshi Rara. Mitsuki is a pilot of one of the core robots and figures if she fights to help end the war faster, Ken Sanada will have time to make the portal back to their original world.

EP3 - Illegal Guy

Kazuki is persuaded by UN Inspector Akane and Ken to be Hartzenen's pilot. Only females can pilot the robots, so they are amazed that a male can activate one. Kazuki meets the alien D. Kazuki practices using the robot and he pilots Hartzenon in battle with Mitsuki and D. He is terrified at first, but when D and Mitsuki are in trouble he forgets his fear and springs back to life to save them.

EP4 - No Disguise

Ken Sanada, who is not Mitsuki's father in this parallel world, tells her that since Kazuki does not exist in this world, he has nowhere else to stay. Akane wants to keep Kazuki a secret from the enemy, so Ken designs a uniform that makes him look like a female. Kazuki goes along with it at first but when Ken introduces him to the others on the base they laugh their heads off. Embarrassed, Kazuki runs away and Akane traps him in one of the corridors, pleading with him to be reasonable and wear the suit. Escaping, Kazuki meets Yayoi, who returns the jacket he wrapped her up in when she was injured. Kazuki agrees to wear the female suit (but only for one time!) and Ken promises to have a male uniform made for him by the next battle.

EP5 - Campus Life

Kazuki attends school posing as Mitsuki Sanada's younger brother. A huge group of male students give him love letters for her and try to buy the lunch she made for him. Annoyed because he accepted all the love letters, Mitsuki makes him write a response to each one. The next day, Mitsuki is upset to learn D is moving in with them. Ken Sanada had put her in Kazuki's room, saying that it will improve morale between the pilots and D responds to Kazuki, so Mitsuki builds a wall to separate D and Kazuki. The gang takes care of some household chores and Mitsuki gets upset when D follows Kazuki's instructions instead of hers. Mitsuki is angry when D accidentally throws her diary away, but tells D it does not matter. D goes off in the rain to search for it and Mitsuki and Kazuki look for her. When Kazuki comes home he finds another door to his room. Mitsuki comes in and they both learn that Yayoi, who lives next door, will be part of their daily routine too.

EP6 - Intrigue

Mitsuki is upset with Yayoi because she is taking over at home, at school and on the base. She sets up a plan to have Reika marry off Yayoi. Reika finds a wealthy businessman who is interested in marrying Yayoi, but the young woman protests getting married. Reika convinces her to at least meet with him – their families have been long-time friends. The meeting site is near a Rara army battle zone and Ken and Akane want Reika to cancel the meeting but she refuses. Mitsuki assures Reika that the Rara army will not cross the four mile (6 km) limit to disturb them. On the day of the battle, Kazuki fights the enemy close to the four mile (6 km) limit and even though Mitsuki tries her best to keep the enemy away, Kazuki lets the enemy get close enough to cross the limit and cause an evacuation (breaking up the marriage interview, to Yayoi's delight). The rampage causes Miss Ra to fall off a building and Kazuki catches the enemy, saving her life.

EP7 - Hard Case

The EDF and UN officers are impressed at how well Kazuki, Mitsuki and D work as a team. In battle, the Rara army uses the powerful Original robot against the UN Forces. The Rara robot concentrates on attacking Hartzenen, under orders from Rara to capture the pilot. Kazuki is in danger of being killed so Ken sends the surrender signal to Rara. The Rara robot lands, but inside Rara territory, taking Kazuki with it. Behind enemy lines, the robot continues to attack Hartzenen and a terrified Kazuki loses control, inflicting heavy damage on the superior Rara robot. Ken calls General Rara and begs him to release the pilot, but Rara refuses. Mitsuki wants to go save Kazuki but Ken orders her not to. An explosion rocks the landscape, and Kazuki's friends fear the worst.

EP8 - Mitsuki

When searching for Kazuki, all that is found by Mitsuki and the others of the UN forces is his damaged core robot. Kazuki, who although severely injured was able to limp away from the wreckage, his pilot suit destroyed, wakes up deep behind enemy lines, thought to be an innocent bystander. Miss Ra herself takes responsibility for his recovery. He witnesses Miss Ra change from the harsh trash talker she usually appears to be into a nice young girl who happens to look just like Mitsuki. Revealed to be Mitsuki Rara, the young girl seems interested in Kazuki. Even though he finds this Mitsuki interesting, Kazuki decides that he must get back to EDF territory and hopefully escape without having to deal with Mitsuki's mother Ayuko, who is even more evil than her husband. Ayuko slowly puts the pieces together and finds out Kazuki's true allegiance, along with footage of him exiting Hartzenen. Mitsuki learns that Kazuki is a EDF Core Robot pilot, but helps him to escape.

EP9 - Escape

After escaping back to Earth Defense Force territory, Kazuki tries to get things back to normal but keeps thinking of Mitsuki Rara. Ayuko discovers that Rara's secret weapon, a powerful robot named HIMC, is rejecting Miss Ra because of her feelings for Kazuki, and has her brainwashed to attack without feeling. The Rara Army directly attacks the Earth Defense Force's headquarters with copies of the Original robot and HIMC, easily penetrating their defenses and sending them to the brink of defeat. Kazuki pleads with Miss Ra to remember him, but to no avail. HIMC obliterates Hartzenen, and in a catatonic state Kazuki summons the robot Zinv from its resting place deep inside the EDF headquarters. Kazuki and Zinv destroy the invaders and rescue Miss Ra from HIMC, which escapes on its own.

EP10 - Repatriate

Mitsuki Rara moves into the house with Kazuki, Yayoi, D and Mitsuki Sanada. The Rara forces are losing one battle after another especially when they are going up against Zinv, Kazuki's new robot. Rara demands the return of his daughter, and UN officers seize her to fulfill his wishes, derailing a date that Kazuki set up with her. The Earth Defense Force defies them and allows her to stay. Meanwhile, Ayuko wages an all out attack with a new weapon. With a blinding flash, Zinv and Mitsuki Sanada's robots vanish.

EP11 - Real

Kazuki awakens back in his own world. He's worried about his friends but tries to get used to being back home. The Rara and Ken of this universe have joined forces to study the parallel world. The barriers between the worlds have begun to break down, and robots begin to appear in the city, causing massive destruction. Kazuki and Mitsuki choose to go back to end the war and seal the rift. When Kazkuki arrives, he learns that Mitsuki had once again arrived in the parallel world before him and was captured by Rara.

EP12 - Ardent Desire

The war is not going well for Kazuki and his friends. The Earth Defense Force has been disavowed by the United Nations and left on the run in an artifact vessel. In her jealousy at seeing Kazuki rescuing Mitsuki Rara (the new pilot of Hartzenen) instead of her, Mitsuki Sanada is tricked into piloting the complete version of HIMC. Ken discovers the parallel worlds are rapidly destabilizing, and destruction of both worlds is imminent.

EP13 - The World

Though Mitsuki Sanada tries to stop it, Complete HIMC easily defeats Zinv, leaving Kazuki trapped inside. D sacrifices herself for her love of Kazuki, crashing the empty artifact ship into Rara headquarters and destroying her bioroid body. Her soul returns to her real body, and she unlocks the limiter on Zinv, allowing Zinv's Light Hawk Wings to manifest. Zinv removes Mitsuki Sanada from HIMC and creates a black hole that crushes HIMC and the Rara base. Kazuki must destroy Zinv to save the two worlds and seal the rift. But when the dust clears, the world has changed. A third parallel world has formed where everyone gets to stay together, Kazuki and Mitsuki Sanada's wish come true.

EP14 - Final Frontier