[Comprehensive] 101 days of exchanging bodies with someone

One day, the genius magician Arya and the esper who came to Academy City No. 1 exchanged bodies for unknown reasons.after.The entire academy city has realized the once mysterious, but now super popular and powerful and indifferent superpower No. [-], and his little girlfriend who can be said to be very bad-tempered and arrogant.What they don't know is that those are not themselves.The male protagonist forcibly softens the treatment, ooc is for sure.Mary Sue, Xiao Tianwen, doesn't explain, refuses to pick up and spray.