Konyakusha wa, Watashi no Imouto ni Koi wo Suru
Fiancés Fall in Love with My Sister.

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The time loop or temporal loop is a plot device in fiction whereby characters re-experience a span of time which is repeated with some hope of breaking out of the cycle of repetition

Comment under my profile if you have a suggestion you think fits and I'll check it out, or if one of these isn't a time loop and the description misled me. (I haven't read all of these yet)