If you liked the Kodocha manga, the Anime-Planet community thinks you'd like:
Mikan's best friend in the entire world, Hotaru, has moved away to a school for geniuses. Mikan misses her friend so much that she runs away to Tokyo to find the mysterious Alice Academy. However, once there, Mikan discovers that it is actually a secret school for children with special abilities. Alice Academy is filled with boys and girls who can do anything from make crazy inventions to control fire. In order to stay with her friend, Mikan tries to enter the Academy, but there's a catch: she doesn't have any special powers! Now Mikan must prove herself to her classmates in order to stay by Hotaru's side.
Even though Gakuen Alice is a fantasy and Kodomo no Omocha is about actors, these two mangas are very similar..they both have the same type of easy-going heroine who is actually very strong and a hero who has a hard life which the heroine makes better ^^Both are funny and silly but with serious context and they shows the power of love and friendship and not giving up.
Kodomo no Omocha is finished already and Gakuen Alice is still ongoing, if u liked one u will surely like another one too.
Both animes are about girls who have a kind of problem with some of their classmates (who are boys in both cases) and Sana's and Mikan's personalities are quite similar even though Mikan is more like a crying baby and Sana has a huge ego - they are both fighters and do everything to change their worlds.
When Kanji was a child, he made a promise with crybaby Tamako that they could be married when they grew up, as long as she became stronger and stopped crying so much. Now, as a teenager, Kanji runs errands for his perverted father who runs Dog Run, a talent agency. Their top star is an idol named Shinju Momono, but she has a secret: as a teenager, she had her mother raise her young daughter until she could support the girl; and now that Shinju is famous, she can! There's just one catch: Shinju's daughter is none other than Tamako! She hasn’t forgotten the promise they made, and has become much stronger – to the point of looking and acting like a boy – to win over her Kanji. What’s worse, Shinju must keep her daughter a secret to protect her public image, so Tamako moves in with Kanji's household instead. Will Kanji ever warm to this boyish, 'monkey girl's advances?