Koi No Jumon summary:

[Paradise Love Scanlations]Mihara is a teacher who just can not have a long relationship with a girl. Then one day go to a bar and tries to prove that is not gay so enters with a terrible temper and rejects all that come around except Shouta, who falls for him at first sight. From then Shouta will not stop bothering Mihara do it because you want to fall for him. Why Mihara refuses the idea of being gay?