While visiting his hometown, junior high school student Michishio Nagasumi's life was changed forever when he nearly drowned. Though he was saved by a mermaid named San, there’s a catch -- her family is part of a merfolk mafia, and they abide by a strict rule: If a mermaid is discovered by a man, either he or the mermaid must die. That is, unless the man marries into the family! Faced with such a decision, Nagasumi can only oblige their customs and become a "happy" newlywed. Now, with a new school year around the corner, Nagasumi must find a way to deal with his new bride, keep her true nature a secret, and most importantly, escape inevitable death at the hands of San's over-protective father’s gang!
Rito Yuki is a bumbling boy who wants nothing more than to confess his love to the lovely Haruna, but a variety of obstacles always seems to stand in his way. One day, while relaxing in his bathtub Rito found his hands full - literally - with the breasts of a strange alien girl named Lala who suddenly appeared in his lap! She is the princess of Planet Deviluke, and she has run away from home to escape the prospect of an arranged marriage; and unfortunately for Rito, his accidental groping is the traditional engagement ritual of his otherworldly guest! Deviluke's emperor will destroy Earth if Rito backs down from his "proposal," but all he really wants to do is be with Saruyama! Naked antics, magical powers, misunderstandings, Lala's marriage-happy family and Rito's own shyness are many of the barriers he must face in his attempt to win the real love of his life – that is, if Lala doesn't win him over first!
When Marin and Urin – two sisters who live in the sea – find a ring that dropped into the water from the land of Sky, they decided to travel above to return it. There, amidst a bustling festival, they meet the ring’s owner; her name is Kanon, and she wants nothing to do with the ring, which was a present by her ex-boyfriend. After Kanon refuses to accept the ring and throws it away once more, the girls continue to search for it, accidentally releasing half of a great evil whose spirit was sealed both above and below the water. But luckily, there’s hope – Matsumoto, the Elder Turtle from the sea, appears and reveals that Marin is none other than the Priestess of the Sea, charged with defeating the villain. Marin must now fight alongside Kanon - who discovers she’s the Priestess of the Sky - to put a stop to this ancient power and its possessed minions before it’s too late…
Both anime are about girls that are able to survive underwater. Seto no Hanayome takes the mermaid / comedy approach where Umi Monogatari they are more just water dwellers naturally and takes things more seriously even though they are magical girls. Both shows have a similar feel to them even though Seto is more hyper than the other. This is kind of a gut recommendation cause i'm sure if you liked one you will enjoy the other.
Kaname Okimura wants to learn how to swim, but has been afraid to due to a childhood accident. So how does he approach his fear of water? By joining Umisho's swimming club... but as the manager. Things are easy and slow going for Okimura, until an eccentric family moves into town, literally floating their home to the shore! Okimura watches as the hyper and childish Amuro Ninagawa and her father make their entrance, only to find out that Ninagawa is as agile as a fish in the sea she lives on. Her swimming style may be unorthodox, but she's quickly recruited into Umisho's swimming club, spicing up school life and making things interesting and complicated for Okimura...
Both of these anime series have some a similiar styling. The introduction of a drowning male character saved by a "Mermaid". The annoying rich third party girl who tries to take center stage. The socially imcompetent companions of the main main character. The oddball main female character who confuses everyone because she's different. Although Seto no Hanayome was more slapstick comedy and Umisho was more ecchi, both seem connect together on many things.
Ataru is one of the most desperate womanizers alive, and a man whose life is about to become complicated. When aliens invade, he discovers he has been chosen at random to be mankind’s defender, and must play a game of tag with the beautiful alien princess Lum to decide the fate of the planet! After chasing her with all of his crafty techniques, Ataru finally wins, but his victory also means he must marry the princess herself! Now, with strange alien visitors and a jealous wife to handle, Ataru still manages to keep an eye on his ultimate goal: having his own harem!
Both animes are similar in plot, scenario and even the characters (though, Urusei Yatsura came 20 years before Seto No Hanayome). Both shows are about a boy (Nagasumi/Ataru) who ends up getting to a moe'-like non-human girl (an alien and a mermaid) who looks like an ordinary human girl,much to the annoyance of his disappointed parents, the mother who regrets getting married and the father who always worried about his mortgage. After the girl's (San/Lum) extreamly strong, big father forces the marriage against the boy's wishes, the girl ends up living with the boy. Then a host of similar (because they're pretty much the same in both animes) characters appear such as the extreamly sweet, pink-haired scznophrenic bitch (Luna/ Ran) who's the childhood friend of the girl and a extreamly wealthy, powerful heir to a Japanese conglomanate company who always wears a white suit, speaks about honour and uses a samurai sword. Cue similar plot devices such as fan clubs for the girl (San/Lum) and the pink-haired childhood friend (Luna/ Ran) who are constantly at war, old fiances and an extreamly sexy school nurse (Ran's mother/ Sakura)who's connected to the boy in some way and once you watch 'Seto No Hanayome' and 'Urusei Yatsura', you real realise how similar the two shows are.
Dimwitted Azuma Kazuma is a young man with a dream -- to create a bread worthy of the name "Japan", made by the Japanese people, for the Japanese people! With hefty bread-making skills, hands that have an uncanny warmth to help dough ferment, and will power like no other, Kazuma must put his delicious creations to the test as he struggles to become employed at the prestigious Pantasia bakery, for fame and glory! Yeast, beware... Kazuma is in the kitchen!
Though Yakitate Japan and Seto no Hanayome are very different plot-wise (one is about baking bread and the other is about a mermaid mafia), they are both packed with exaggerated humor and silliness. Laughs aside, both series also do a good job of telling a story of successes and failures that will find you cheering for the main character.