Aka's past. His father often got drunk and beat his own wife (Aka's mother). Aka loves his mother very much, he always takes care of his mother, always sticks to his mother and doesn't want to move away even a little bit because he's afraid that his father will come and beat his mother again. Aka took care of his mother until he was 15 years old but when Aka wanted to deliver water to his mother's room, Aka found his mother had hanged herself, the end.

so, Aka doesn't like seeing women being abused by men. Aka has a girlfriend and Aka loves his girlfriend very much, doesn't want to be rough with his girlfriend even a little bit because Aka is afraid that what happened to his mother will happen (hanging herself), even though sometimes Aka is rough but he will quickly melt because he remembers his mother