Kobayashi ga Kawaisugite Tsurai!!  

こばかわ, 小林が可愛すぎてツライっ!!, So Cute It Hurts!!

Megumu and Mitsuru Kobayashi attend separate schools for girls and boys respectively. Bored with being surrounded by individuals of their own gender, they decide to swap places with one another. Initially, this deception goes unnoticed until romantic feelings arise. In the anime "Kobayashi ga Kawai sugite Tsurai!!", Megumu confesses his love for Aoi Sanada while disguised as her brother and shares a kiss. This leaves Aoi questioning his sexual orientation since he was never attracted to girls before. Meanwhile, Mitsuru finds Azusa Tokugawa in a vulnerable state while in his arms, causing her heart to race. Both couples are enjoying their newfound romantic relationships, but the secret of the twins switching identities has not been revealed yet.

Kobayashi ga Kawai Sugite Tsurai!! was bundled with the limited edition of third and sixth volume of Kobayashi ga Kawai Sugite Tsurai!! shoujo manga.