Tatsumi finds Wakasa, a merman, one day and brings him home. Wakasa then begins to live in Tatsumis bathtub.
The op doesn’t seem to have much to do with the show itself? The op was like, serious, then the show itself was just cute and a little funny. It’s not serious at all but it’s a cute way to spend an hour. Or just 4 minutes here and there.
So yea, it takes like, an hour to watch the entire thing and pretty much each episode can be watched alone. Just keep in mind that it’s like, 5 men. In a bath tub. and every once in a while a little girl that has a serious bro-complex. Good to watch if you watched and liked (or a recommendation if you liked this) Kono Danshi, Ningyo Hiroimashita. The art is different but the characters are similar looking and it’s similar story (you know, human living alone brings back a merman). Kono is a bit more serious though and is more shounen ai.