I hate it when people hates the fl for being childish despite regressing and then still hates fls when they are being matured and call her weird/creepy for acting too matured for her current ‘age’. Example is lady baby.
Good example is: Tia from In "This Life, I'll be the Matriarch"
Now that is a perfect example. She is reincarnated, but it isn't about her being all "Oooh ah kyaaa ⚘٩(๑❛ᴗ❛๑)۶ ..." but more like actually using her skills to make a difference.
Nor make her the center of a cringy harem like "Lady Baby"... yikes...
i guess he just treats siwoo like a hyung he respects so he did not want him to know he swings that way not knowing he also likes men loooool, and siwoo probably thinks he is a brother he wants to guide and protect.