Ai Ore!

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.

Note: Because Shinjo Mayu stopped her job relationship with Shogakukan, she continued her incomplete manga in Asuka and called it Ai Ore! This can be considered a continuation of Ai (w)o Utau Yori Ore ni Oborero! or even as a second series.