 If you liked
Kareshi Kanojo no Jijou
|
 ...then you might like
Sunadokei
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Both are similar genres (slice of life, romance, drama), although the relationship conflict in each stems from different things - in Kare Kano it's more centered around personal issues, while Sunadokei is about the relationship itself and is more of a love triangle dynamic. In addition to this, they both have a lot of character development, and both appear to be typical shoujos but actually cover quite heavy topics (family issues, mental illness, loneliness, etc). If you like one you will probably like the other as well.