Hmmm that last bit you wrote confuses me a bit, but could it be “I Want to Sleep with Idol-kun” or “Revenge (Matsumoto Yoh)” or one of the “Therapy Game” spinoffs? Here’s others, but I don’t think I’m hitting the right mark. “ Kiraide Isasete – Mane to Otoha” and “ Koi ni wa Mukanai Shokugyou”. Not sure but that’s my two cents :)
sorry about the last part, i was typing so fast that i didn’t use punctuation marks. i meant that his(seme) brother broke into his house to dig for something that would destroy his career. which is where he found the uke, the uke had moved into the semes house at that point of the story. but i found the story!! near and dear

so it’s about an ex idol who becomes a manager for this actor. the main character stopped being an idol bc some shit happened i can’t remember. turns out the actor actually knew him during the times when he was an idol but never rlly told him. he was like #1 fan or sum. there’s a chapter where they went to eat out separately in one room it was the ex idol with his old members while in another room the seme is with his family turns out that he’s an illegitimate child and hated by that family. and then like the uke sees him while he’s walking out. blah blah stuff happened the semes brother tried to break into his house where he found uke. he wanted to find stuff abt him cuz he’s famous and shii. then like some stuff happened blah. blah. blah and then the uke finds a letter, it’s a letter he wrote, back when he was an idol then he remembers of seme bc he was one of the only fanboys
it’s not scandal break out