My Sweet Tyrant - Season 1 Episode 4 The Beginning Of It All
Overview: Akkun recalls how he first started dating Nontan in middle school, where they gave each other their nicknames. After which, Nontan's mother gave him his first photo of her, and from there he started a habit of taking secret photos of Nontan and pasting them all over his room walls and ceiling. Nontan has no idea of his habit though.