Bakssiyudaegi

Ordinary male student Park Nam-joo is attracted to cute female student Park Yeo-joo in the same class. But her identity is unimaginable...! The owner of 'Extreme Serialist' \[We're in a relationship even though she's an elementary school student\] made her debut in Lezin! Is this where Resin comes from, or is it from now on? (Source: Lezhin; translated)