What would happen if Araragi and his harem of lolis, sisters and tsunderes attended the same high school of a certain pessimistic, social critic of a loner and his 'acquaintances' in the Service club. The bubbly and energetic Yui Yuigahama and the cold but intelligent Yukino Yukinoshita?

Hikigaya Hachiman once suffered from a case of Chuunibyou — Eighth Grade Syndrome. Those memories are some of his worst: terribly embarrassing, overly self-confident, and completely delusional. Good thing this new transfer student knows all about it. May be continued in December.