 If you liked
Tonari no Kaibutsu-kun
|
 ...then you might like
Koisuru Harinezumi
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The male protagonists are very similar in the sense that they both get into fights very easily and thus don't have many friends. They both find a girl that sort of helps them become a little friendlier, which leads both guys to become unsure about their feelings towards the girls; they constantly contemplate whether it's "like" or "love". While Tonari no Kaibutsu-kun is a bit more comedic, Koisuru Harinezumi is filled with more romance.