[Saru Wakka (Sarujie)] Suki Houdai Sasete kureru Kouhai Tsugou ga yo Sugite Ayashii kara Kousoku [Digital]

Whoa thanks for the summary. A bit of a sad story for the fmc but relatively tame still. Hope there's a part 2 with a nice ending.

thanks for the story @minminazusa

A bit heavy. The MC has an overly cautious personality, the type that when good things happened, the first thing in his mind is asking what's the catch, or if it's real. Only Rika, his junior, keep close to him. He did thought of possibility that she had a feeling for him, but his suspicion still got the best of him and he graduated just like that. One day, Rika came to stay in his place, saying she will pay with her body. If he think something is fishy, he can chain her and keep the key. After that, by her persuasion, he start to have sex with her, yet never know why she came to him. She wouldn't say either. Instead, Rika told him, if he keep fuck torturing her, she might confess about her reason. || Yeah, it's almost sure she likes him. But with his personality, he wouldn't believe if she confessed her feeling. So instead, she gives him an excuse. He can keep telling himself it's safe, she can't betray him, so he can just enjoy the sex.

Needs translation 😫😫😫