Kimi to Scandal!

[MangaDex]

 

[Pokari]

Alas, the manga-updates tags and the description lead me to believe they were step-siblings, but the first chapter makes it clear they are in fact half-siblings which is a bit much for me. ("step-siblings who never knew each other"—that is to say neither blood-related nor raised as siblings—is about the border of my tolerance.)

Spoiler

Nevermind, obvious plot-twists exist which I was half-expecting due to the MangaUpdates tags. Though... This manga is utter garbage regardless XD