It's quite confusing. There's the sister who traumatized him as a child, there's the childhood friend who broke his heart, there's the friend from the basketball club who disappointed him because she was ashamed of her own feelings. But then a new neighbor appears, who starts to grab the guy, takes him to her house, insinuates herself to him in front of his mother and when she was alone she started saying things as if she already knew him and had done something bad to him in the past. And finally there's his mother with some strange attitudes, like wanting to take a shower with him and this chapter of her dominating on the sofa and waking up and starting to grab him with a vibe of desire. I'm going crazy with this manga.