If you liked
Haru yo, Koi
|
...then you might like
Hetakoi
|
Similar in that are multiple relationships with an unrequited love
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Recommended by chulian1819
Seinen romances in general tend to have a darker, more emotionally torturing effect on their heroes. Bad timing, misunderstandings, indecisiveness - it's generally what makes a seinen romance.
The heroes enter deep depression, they vent their frustrations through lust - it's what makes a man. In these aspects, these two mangas are very alike.
Though Haru yo, Koi is definitely more sex charged - the drama you'll find seeping out of these is generally something you'll crave for.