Who said uke is virgin? Tay have sex with guys as well but he was just top with them he is bottom with ilay only and he can't resist him since ilay just not match to fight back , and that's why it's old novel they are classic in behaviour unlike roses and champagne and codename, if you read novel and manhwa at the same time you would feel that ilay don't have trauma or anything to have this type of personality he just born this way old time seme don't used to trauma they just not weak to their past just as ilay is.
Yes, since tay as kid told ilay to correctly pronounce his name since Korean names are usually hard for foreigners to speak, and even before Tay could know whom he is speaking to tay himself cut off the line, ilay knew it's tay whom he speak to that's why when he pointed gun at his twin brother at party and gun backfired on ilay hand he said "i want to meet your brother" so ilay knew all along about tay but tay don't have memory of that convo at all .
Ilay is acting like a crazy teenager who fall in love for the first time in his life lol , but ilay is better than many other characters i have seen(ceaser and zehniya) since it's novel is made back in 2006 so others are just carbon copy of passion , mostly ilay character is that cuz he just born this way there is no trauma and experience for us that could make us pity party him so we could like him cuz ilay is strong himself with no weakness unless it's tay who is becoming his dear . I actually noticed passion is actually good storyline which don't revolve around sex alone plot is also there.