Tsubomi is a young girl coming of age and along with it she gets new feelings and changes in her body. Her mom is having another baby, but she’s doesn’t fully know how that happens and why. She has to learn to deal with her growing feeling for Nemoto and when there are other girls around him. Daiki Nemoto is not just someone at school, but also her neighbor and friend of friends. Not like you can avoid him? Ater a while he learns he has feelings for Tsubomi in return.

Hakaba Kitarou is without suprise the annoying bully like character who just happens to be the blonde boy. He’s also only main character in the circle that has a male voice actor. Kitarou is a pervert who’s teasing has made little Kato concerned about staying cute and thin. He’s easy to relate to because many people including myself treat others they like kinda the same way. Always pushing buttons, bringing shocking bits of news, and name calling for attention.

If you’re interested in watching Naisho no Tsubomi, the fansub group Underwater makes it very clear they don’t like VLC player. There’s special coding that covers the whole screen asking why you’re still using it and that it sucks. It’ll show you what’s being said, but it’s not worth it.

Characters are drawn very modern and casual with even some wearing baggy pants. Expectations of Naisho no Tsubomi was that the anime would be too blunt or educational. Mention something perverted though, you get everyone’s attention. Mostly from boys. And there’s several mildly pervert bits to this anime like Tsubomi getting dressed.