Not sure why im taking the time to write this but here we go:

Story 5/10 - Nothing groundbreaking here, it's exactly what the summary says. Man goes back in time, confesses to his hot teach, she instantly falls in love with him and minor hijinks happen because she's a complete airhead. Every chapter involves secret flirting, almost getting caught, and somewhat amusing but never laugh out loud situations. Not bad, not good. Also, the summary makes this seem more leud than it actually is by constantly inserting the word lover. Might change at some point, but as of the currently released chapters, nope.

Art 8/10 - the teacher is drawn extremely well (and really, she's the only reason anyone is reading this), the time traveling MC and his sister are drawn very decently, the side characters are drawn fine to intentionally ugly. The background is fine.

Characters 4/10 - the MC is decent enough for the 22 chapters available, no real complaints. The teacher is a complete airhead, unrealistically so. Very kind and cheerful though. The MCs sister is in love with the MC and is teetering on the edge of being a yandere (her entire personality is based around this), and the teachers sister is probably actually mentally disabled and she gets turned on when a cat licks her face. None of the other characters are remotely important.

Enjoyment 6/10 - its worth sinking some time into if you're looking for a simple romcom with a teacher/ student pairing. If it was like one hundred chapters, I probably wouldn't have finished it if it kept the pacing it's currently going. Unfortunately, judging by how they're trying to make it almost two whole years without getting caught, it's probably scheduled to run more than that. It'll defintely get canceled before that though.

Overall - im giving this a six because it didn't overstay its welcome with only 22 chapters. It's... fine. I wouldnt have made it past fifty chapters at this level of storytelling, even with how short these chapters are. It draws you in thinking it's going to be more risque than it actually is, but it never reaches that point. It's too leud to read in public, but it's nowhere near the level of a hentai with plot.