Hanatani Mitsuba, a simple university student, confesses her one-sided love to a senior student, but is rejected. He is introduced to his brother as 'my brother is gay too', who tells him that 'a virgin like you is too hard for a straight guy like my brother' and 'I'll teach you', and he ends up being taught male-on-male sex... This is the story of a love triangle in which the protagonist is torn between brothers. 地味な大学生花谷三葉は片思い相手の先輩に告白するも玉砕。 「俺の弟もゲイだから」と紹介され、その弟には「兄貴みたいなノンケ相手にアンタみたいな処女はハードル高すぎ」「オレが教えてやる」と男同士のセックスの手ほどきを受けることになり…。 兄弟の間で揺れる主人公の三角関係のお話です。メインは弟×主人公。