tw for gore

okay so ive read this manga a while ago and i cant remember its name. it was about a guy getting superpowers and wanting to kill the girl he loved which was his childhood friend as well. he gets these superpowers and constantly wants to kill his crush and tries hard to overcome that killing intent, and sometimes sees visions of him killing that girl. in one particular vision he saw himself ripping the girl's guts and tying them to a car then driving around the town showing off. even though i remember its plot well i forgot its name and google doesnt help me finding it by writing "guy tries to kill his gf". if you know the manga please tell!!