Taeseo actually catching a feeling and wanted yeomin to tell him "i love you" when sober. So he waited and stalking him at home waiting for yeomin to say it lolol. He cooked for yeomin too
I might be wrong, I thought the same at well, but I think he was waiting for him to mention it was his birthday. That makes a bit more sense but who knows
A little bit spoiler
Taeseo actually catching a feeling and wanted yeomin to tell him "i love you" when sober. So he waited and stalking him at home waiting for yeomin to say it lolol. He cooked for yeomin too