ONI URE IDOL GA KYOU MO WATASHI WO OSHITEKURU

Unpopular underground idol and actress, Enatsu Sayuki, faces her work diligently everyday to achieve her dreams of making it big in the world of acting. ...However, for some reason, the superstar idol Sera Touma—who should be her rival—becomes her biggest fan!! Adorable enough to make Sayuki jealous, Sera takes every chance to passionately declare her love, throwing Sayuki’s life into chaos. Will Sayuki be able to achieve her dreams? And what will become of the one-sided love(?) between Sera and Sayuki…!? The curtain rises on the clash between these young talents in the fierce age of idol showbiz—let the show begin!! (Source: Bunkasha, translated) — Description from AniList community (anilist.co).