this seems like your usual 6.0/5.0 rating manga, but for some reason it seems like it's enchanted with magic to make you feel its better than you think. its good, 8.0
last two chaps were quite disappointment, it should have been explained that it wasn't time travel but his reincarnation magic, then he should have fly to (the association girl that died first) to borrow spider, OR SIMPLY KILL HIM WHEN HE STILL IS INSIDE THE CELL!