Otome wa Boku ni Koishiteru

I started watching it because it's my favorite hentai drawing. *___*
It would seem that the situation is hackneyed and ridiculous – the boy is bequeathed to study at a girls' school, he changes clothes and no one even suspects anything. He walks around, attracts attention, is surrounded by a harem, in general, he lives according to his own style. As a result, she becomes the "big sister" for the whole school, the girls squeal and drag.
The guy-girl exists somehow on his own, and although the whole plot revolves around him, he doesn't do anything, but the harem around him has a lot of secret rooms in his heart, where interesting secrets are hidden. As a result, all 12 episodes open the doors to these rooms of secrets and exhaust the nerves of the girls. There are hints of tragedy/psychology here, but there is no shojo. Even if (almost) everyone thinks they love a girl, they're actually fascinated by a guy. And in general, this anime is not about love, but about the struggle with your feelings. Suddenly, "A girl fell in love with her older sister."