比羅坂日菜子がエロかわいいことを俺だけが知っている。 (Series) favorite_border

[DeepL Translation - needs review] Volume 1 Description: High school student Hiroki Hirose (Hinako Hirazaka) has a secret that only I (I) know. It's that I can see him having sex by himself in my mind when I think of ...... his partner. This is a slightly naughty love story about two childhood friends who secretly observe each other. Volume 1 includes 13 newly drawn pages!

(Translator: DeepL)