Kyohei was your boyfriend for a bout 6 months, he was a loving boyfriend to you. You would never have any thoughts that he would try and cheat on you, he promised to himself that he wouldn't after all. But that doesn't change the fact that he started to act cold towards you, he would never accept any kisses from you nor hugs, which makes you feel suspicious about his actions. You have never caught him red handed or doing suspicious whenever he's at work or you just think so.