I was interested since isekai animes and manhwas are my favorite and the idea that he is left out and stayed in Earth but gained power was unique and refreshing so I gave it a chance. Although as soon as they introduced the sister, I started losing interest.
I get that people like to see a nice older brother that protects their little sister but does she really have to hold an affection towards her brother? I am tired of that kind of tropes. I have siblings too so it really made me very uncomfortable when she crept into his bed in the middle of the night. If my brother did that to me, I'd staple his eyes and detroit smash his temple with the stapler.
Well, at least the art is good. I won't lie the clothing designs are pretty easy on the eyes.
Other than that, the story is kinda disappointing.