This manga started off as a silly gag and ended up as one of the best shoujos I have ever read. It ticked pretty much every box for me - good world building, amazing chemistry between characters, nice pacing, cute art, sweet as all hell romance, a decent chunk of story even after the confession and some amazing one-shots in between to spice things up. Also bonus points for having like, the bisexual king (Nanao) that makes up about 40% of this manga's charm