Mamoru-kun ni Megami no Shukufuku wo! EP21 - I don`t want you to go far away

We find out that Ayako-san has 1 week to unseal her Beatrice before she basically is dead because her body has fused with the Beatrice. Misaki-san invites her to his lab in Germany to help unseal her Beatrice but Ayako-san feels that he is trying to get her involved with his research. Ayako-san and Mamoru-kun go talk with Mamoru-kun's mom and sister about going to Germany. Mamoru-kun's mom is all for it, but Itsumi-chan, Mamoru-kun's sister, is not wanting him to go. Ayako-san turns down Misaki-san's invitation to come to Germany. Ayako-san collapses and tells Mamoru-kun to stay for his classes. Itsumi-chan goes to Ayako-san's house to visit Ayako-san but when she is getting ready to leave she sees Abiko-senpai tying a rope to a pole. Abiko-senpai and Itsumi-san sneak into Ayako-san's place. The strange person that was outside Ayako-san's house is now trying to attack Ayako-san. Mamoru-kun and Emelenzia-chan save Itsumi-chan and Ayako-san. What is going to happen after they leave for Germany?