After his angelic brother’s birth 17 years ago, Haruhisa became an extreme brocon the moment he laid eyes on him. He poured all his love into his little brother in their busy parents’ stead, putting his own needs aside. On the day of his precious brother’s teacher-parent conference, Haruhisa marches in, ready to evaluate Mitsuhara’s worth as a homeroom teacher. A few days later, Haruhisa discovers that his brother has a lover! Moreover, it’s a male student from the same high school!? Turning to Mitsuhara to find out the truth, Haruhisa is suddenly kissed for some reason…?

Arihara Keigo – he excels in any role he plays, and he has a few awards under his acting belt. Arihara meets Matsushita, an idol and his co-star, who struggles with acting. One day, Matsushita mistakes the dressing room and discovers Arihara's secret. The "aloof and mysterious" Arihara that everyone loves is actually a klutz with a sweet tooth! As the two become friends, Matsushita becomes interested in Arihara's real personality…!?

Eight years ago, our parents remarried and we became brothers. Haruto is six years older than me. We're not related by blood, but he treats me kindly and takes care of me as if I were his real brother. Because of this, I started harboring this desire to monopolize him… I don't want him to find out about these dirty feelings! Although I live alone now that I started university, my brother found a way to come after me…!?