Sekaiichi Hatsukoi 2 EP4 - Delay in Love is Dangerous.

Yoshino is conflicted between his fondness for Hatori and his friendship with Yanase. Hatori makes a movie date with Yoshino but cancels at the last minute due to work. That same day, Yoshino becomes upset when he spots Hatori with an old high school girlfriend. While brooding over the incident, Hatori calls Yoshino, who hangs up on him. Yanase invites Yoshino to his house, where they recall Hatori's former girlfriend from high school and Yanase implies that Hatori is cheating on Yoshino. Hatori phones and Yanase tells him he intends to make Yoshino his boyfriend. ...