Well okay then
Well if while in a relationship you fell in love with someone else and because of this you terminate your first relationship you are not a cheater. A cheater is someone who have 2 parallel relationships or having sex with other people while in an exclusive relationship. Also yes Lya is correct for another reason. Seme was openly telling to family and co-workers (well practically to everyone) that he had a relationship with blonde uke even before it became reality (and he was happy because by knowing that, they did not pressure him to get married) So how did he had a parallel relationship to another person from the same business when everyone was told that he was with the blonde uke (whose name I forgot)
It is not as changing clothes. Love is not destiny. You have to struggle to find your match. It is not easy, and not every crush is immortal love
@Lya96 Are you sure about that? In the sequel Reiji says that his lover found another person he likes while he was away. It also shows the seme saying 'i love Masato so let's break up' meaning they were still together when he was making a move on Masato. Get it right before saying anything and misleading us. The seme was a two timer.