Unlike isekai heroes gifted with "Level 100 Sword Mastery," Kaito's power comes from years of obsessive practice. Every reader who has ever tried to draw knows how hard perspective and anatomy are. When Kaito succeeds, we feel it is earned. He is not a cheater; he is an artist whose lifelong suffering (canceled manga, poor sales, carpal tunnel) is finally rewarded.

The protagonist is a genius manga artist specializing in raw, hand-drawn illustrations (oekaki skill — rough, fast, expressive drawing).
After dying or being transported to a fantasy world, he discovers that his drawing ability functions as a unique magic system — for example:

Based on raw chapter rankings and fan polls, these are the top 3 arcs you cannot miss:

The story seems to target fans of manga and light novels, particularly those who enjoy isekai and fantasy genres. The inclusion of "raw drawing" skills as a central element suggests an appeal to artistic creativity and possibly a meta-commentary on the manga creation process.