Boring Ninomiya-san (Yaoi Manga) Volume 1

Cram school teacher Ninomiya just got dumped by his boyfriends after being told "it’s boring being with you." After losing all of his self-esteem, the person who appears in front of him is a radiantly handsome man, Sada. Ninomiya gets asked out by him and spends a night with him but... Flirty Sada and serious Ninomiya, the scary eyes Takama and flashy-looking Senba... Handsome x dull boy couples unveil the "I am your senpai!"series!

This series has been published in Japan since 2013 which Japanese title name is "Tsumaranai Ninomiya-san"