In the time loop, I do whatever I want

High school student Makoto Fushimi is a time traveler. He not only traveled to the world of anime, but also fell into a time loop.
He spent countless years on the same day, Yukinoshita, Kasumigaoka, the five Nakano sisters... He tried to use the time loop to conquer all the beautiful two-dimensional girls.
When he began to feel irritated and numb, the time loop suddenly ended and the system came along.
[Intern system 4399 reports, I finally found you, my host.]
[A time error has been detected. Damn it, host, how have you managed to survive in this world for decades?]
[The system task was forced to update. Now I can't graduate from the internship system. Sad.]
Fushimi Makoto: "Don't panic, I have a plan. Since it's already like this, I'll help you complete your internship, and you'll help me get the reward. It's a win-win for both of us."
System: Please elaborate.
[System Task Released: Detected that the host already knows Yukinoshita Yukino. Since you have lived decades longer than others, please become her favorite elder.]
Fushimi Makoto: "Easy, I'll take care of Mrs. Yukinoshita."
system:?
(The male protagonist who takes the initiative to eat meat, please don’t criticize if you don’t like it.)