[Original Webtoon](https://manga.line.me/product/periodic?id=S118162)
His beloved younger sister committed suicide. The cause was horrific bullying by seven members of the student council. The protagonist, Setsuna, swears revenge against the student council and puts his murder plan into action. However, no matter how many times he kills the student council members, he keeps getting sent back to a timeline where they are still alive. It seemed as though his revenge would remain unfulfilled due to the time loops, but Setsuna realizes a single possibility: would the time loops occur if a third party instigated the murders and carried out the revenge? Use every trick in the book to frame someone for incitement to murder! The time-loop revenge drama begins!
Shungiku Nakamura's art book for her [Junjou Romantica](https://www.mangaupdates.com/series.html?id=271) series.
Dumashion, the second prince of the Ishkâk country, is accused of the murder of his father and his older brother. Behind this case is a plot orchestrated by the neighbouring kingdom of Nakâda. Now considered persona non grata, Dumashion has only one goal: to prove his worth and regain control of his homeland. He will be aided in his quest by a handful of colourful allies, as well as by mech-armor, those super-powerful robots capable of decimating entire armies. (Source: Mangas.io, translated)
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!