To satisfy your need for content, here is a detailed walkthrough of the narrative.
Without spoilers, Volume 2 features a conversation near a vending machine that feels like a breakup but is actually a promise. Sajou’s line, "I need to be someone who deserves to stand next to you," reverses the traditional power dynamic of BL. He is not the passive uke ; he is a fighter. You need the full context to understand that this is not rejection—it is deferred love. doukyuusei manga volume 2 full