Success Oriented Guide

It's fascinating! I'm currently reading Chapter 50. The main character, a Guide, becomes fixated on the love interest (ML) but unfortunately dies. Restarting from the past, he vows to prioritize making the ML happy this time around, avoiding any previous misunderstandings or troubles he caused. Believing the ML despises him, he sets out to rectify his mistakes. Little does he know, the truth is:

Spoilers ahead:
Actually, the ML has always loved him, being the one who mysteriously reversed time after the MC's demise.