I Spent the Whole Time Fucking My Girlfriend's Friend While She Went on a Trip

What if Ayaka had confessed first? When her friend Yuuka leaves on a trip and Yuuka’s boyfriend, Hideyuki, remains behind, Ayaka sees an opportunity to show him how she feels. With Yuuka away, the usual distance between Ayaka and Hideyuki no longer feels as clear, and the question of what might have been begins to press against the present. Ayaka’s choice turns a simple absence into a moment of emotional reckoning. The manga explores the tension between loyalty and hidden affection. Ayaka is not merely reacting to a passing chance; she is confronting the possibility that timing may have changed everything. As she reveals her feelings to Hideyuki while Yuuka is gone, the story centers on the weight of that decision and the fragile boundaries it tests. What happens when unspoken feelings are finally given room to surface? This is a quiet, charged tale of missed chances, friendship, and desire, built around one question: would things have been different if Ayaka had confessed first?