time skip(?) where the younger guy goes back in the time the moment the older guy dies/gets hit by a car? older guy was a vet and it was prolly the younger guy's brother driving the car?
This? https://www.mangago.me/read-manga/redeem_only_one_forever/
time skip(?) where the younger guy goes back in the time the moment the older guy dies/gets hit by a car? older guy was a vet and it was prolly the younger guy's brother driving the car?