Osananajimi ga Do M de Tsundere Nan desu ga  

幼なじみがドMでツンデレなんですが

Suzume is a self-proclaimed masochistic bottom who enjoys engaging in casual sexual activities with men without any emotional attachments. His lifestyle attracts the attention of his childhood friend, Momo, who also harbors feelings for him. Despite being aware of Momos affection and his own attraction towards her, Suzume feigns ignorance and continues to engage in his hedonistic pursuits. However, one day, Momo reveals that she has always had romantic feelings for him but is hesitant to act on them due to their shared history.