Tensei Idol to Doruota no Kishi - Vol. 1 Ch. 3

[MangaDex]

 

[EchoGirl]

lol must be complicated but it feels like not hiding a sibling relationship in the fame industry might be more helpful, stalker incident aside, so ppl don't pair you guys in a romantic series (even if he's more of an idol than actor [altho the 'pure idol' kinda concept seems like it'd be any kinda romantic leaning versus 'flirting' with the screen/audience and such in an ad])