Kanojo no Shin

The protagonist, Sakanoue Yukito, starts dating his childhood friend, Homan Yui, after she confesses her feelings. However, their story takes a turn when their mutual friend, Teshigawara Kotone, begins to seduce him using her body. Torn between the guilt of betraying Yui, who loves him wholeheartedly, and the physical allure of Kotone, Yukito finds himself at a crossroads: will he give in to a relationship with Kotone or remain faithful to his pure love for Yui? "I