Yuuri Yamagishi has two childhood friends and a best friend. And one of his childhood friends is his beloved and dear girlfriend. While the four of us were playing in my room, Miyama Kanade, another childhood friend who is not my girlfriend, and I went out to buy a limited edition cake roll. However, due to an uncommon mistake on my part, I returned home in a hurry and heard a loud noise coming from my room, so I hurriedly entered my room. I entered the room to find the two of them talking about something different than usual, like “Insects…” and so on. I was too carefree to notice anything, but Kanade sensed the discomfort clearly. This is the story of a childhood friend and best friend who betrayed me and another childhood friend who saved me.