It's been a while since I read it but if I remember correctly mi-kun was in love with kei-chan since they were little.
Mi-kun was really afraid that if he confessed that it would ruin they're friendship and kinda got in a relationship with his mother co-worker(I forgot his name) but I think they were more like sex friends. He was important to mi-kun though. Some things happened and kei-chan found out mi-kun's feelings and he didn't turn him down but he felt weird with kissing. Idk if I should tell you the rest because it's a HUGE spoiler. But they end up together mi-kun and kei-chan
Okay then, the co-worker and mi-kun's unfortunately die in a car accident so mi-kun has to go and live with his grandfather in Tokyo and mi-kun and kei-chan have a long distance for about 6 years.
Unfortunately mi-kun felt that kei-chan didn't love him the same way so he cheated while they couldn't see each other. I mean I kinda get him because his boyfriend wouldn't even kiss him for 6 years (yes they never did anything for 6 years...) And finally after 6 kei-chan moved in the same house in Tokyo and their relationship start to develop and it becomes really cute
I'm so so SO confused rn. I just finished volume 0 and i'm so anxious about this. Does mi-kun really love kei-chan? What abiut kei-chan? Did mi-kun cheat? Or did he not? Because I remember reading that they weren't lovers. Will mi-kun stop seeing the other guys? Wtf is going to happen?