All Otaku Can Do Is Pile Up Their Lives.

https://www.cmoa.jp/title/297310/
"For the happiness of my idol, I can pile up this life as many times as I want!" -- Five years have passed since the underground idol “Mahalo” suddenly left the group. Acchan is a common otaku girl who worries about her idol's disappearance. One day, Mahalo shows up at the welfare office of her workplace, a battered and bruised girl who has been caught by a man...?! "I am the only one who can save my life, and I am the only one who can save my idol who is stuck in her life."

In order to change her future, Acchan will line up again and again--an “infinite loop” of an otaku's life!