Ai Ore!: Danshikou no Hime to Joshikou no Ouji

When Akira announces he was a boy in the first book "Ai wo Utau Yori Ore ni Oborero" so does the fact Akira goes to Dankaisan the boys school next to St. Nobora (Mizuki's school) Things start to get rough when pressure against Mizuki dating a boy from that school rise. (Source: MU)