 If you liked
Mizuiro Jidai
|
 ...then you might like
Kimi ni Todoke
|
Both are serious romances, featuring little comedy, and lots of drama.
Both are in a school setting
Both feature characters learning about love and it's struggles
Both take time to develop and set up a proper story that pays off in the end
I personally got big Kimi ni Todoke vibes while watching Mizuiro Jidai, Mizuiro Jidai felt like a middle schooler version of KnT, with a but less drama.