Hiroshiman boy Onijiro Otogi, and Russian girl Paulina are a newly-wed couple in their third year of high school. Together, they will learn about proper physical relations as they raid their high school life...

An invincible brother who's willing to do anything for his little sister.

Original Webcomic Xiao En, who was working on a virtual world learning machine, died in an accident, and got isekai-ed to a magical world with the learning machine (AI) that was a slut in the inside but has...