Ichiko Aizawa

Ichiko Aizawa (逢沢 いち子, Aizawa Ichiko) is a major character of We Shall Now Begin Ethics.

Plot
Takayanagi catches Ichiko and Mikun having sex in a classroom. He comments its fine if they are in love, but its a poor choice of place and time.

Next year, Ichiko joins his ethics class. He starts the class explaining that his subject won't help in their jobs as its not practical or versatile like language and maths, and can only be useful at death's doors. After class Ichiko stays and explains that she loves Takayanagi and tries to seduce him, but he explains that she lacks class and he likes women with class, so she can start with calligraphy.

Little by little, Ichiko starts to change herself, practicing calligraphy, studying more and doing her homework. As she focus more on her studies and interest shifts, she starts to distance herself from the boys she hangs out with who get annoyed she isn't sleeping with them anymore. Masaya annoyed that she refused, takes her to a room and tries to force her into sex. However, Takayanagi enters the room and sees them. He comments its fine if they are in love, however he asks if its consensual. When Ichiko states its not, he heads towards Masaya, who punches Takayanagi. Takayanagi grabs his hand and asks him to stop the violence as he isn't allowed to hit him and can't even touch Ichiko to comfort her. Masaya gets angry, but decides to leave. Takayanagi comments Ichiko made a good choice joining the ethics class and that they will be seeing there. Ichiko then confesses to Takayanagi, stating that she won't give up on him.

At the day of the graduation ceremony she finally decides to confess her love for Takayanagi. So she heads out to meet him after all the celebrations are over for the day. Bur sadly Aizawa's confession gets rejected by Takayanagi and when she breaks down and ask for a reason why, he says that it's because he is done with getting married and hence no longer wishes to be part of any relationships.

Takayanagi
Ichiko is in love with Takayanagi, to the point that she changed her lifestyle to try and make herself appealing to him. She ends up being rejected by him on the day of her graduation. It is unknown if Takayanagi shares her feelings, because she rejects her by saying he no longer likes the idea of marriage. But he most likely does.