11 of Me

To Gibeom's surprise, the mechanical calculator he bought working at a junkyard turns out to be a time machine! With the time machine, he sets out to find and bring together his past selves. Currently, all 11 versions of Gibeom are living together peacefully, but unexpected problems materialize as Gibeom(s) interacts with people outside of his circle...

(Source: Webtoon Entertainment)