Ep 1. A Yakuza's Wife

In the vibrant coastal town of Seto Island, a young high school student named Nagasumi Michishio embarks on an eventful summer vacation that will change his life forever. Episode 1 of My Bride is a Mermaid, titled "A Yakuza's Wife," introduces us to Nagasumi and plunges us into a hilarious and heartwarming tale of love, wackiness, and unexpected alliances.

Nagasumi, a timid and ordinary teenager, finds himself facing the vast ocean during his summer break. However, his innocent adventure quickly takes an unpredictable turn when he begins to drown in the sea. Just when all hope seems lost, a beautiful mermaid named Sun saves Nagasumi from certain death. Grateful for her assistance, Nagasumi is determined to repay his debt to Sun, but little does he know that the true madness is yet to come.

As Nagasumi regains consciousness, he finds himself surrounded by a group of eccentric individuals, led by a boisterous, sword-wielding mermaid named Seto San. Nagasumi is puzzled as he learns that Sun is Seto's daughter and that, according to mermaid law, Nagasumi's untimely rescue has inadvertently bound them in matrimony. To make matters more complicated, Sun belongs to the notorious Seto Group, a yakuza organization.

The news of Nagasumi's marriage to a mermaid does not sit well with Seto's mafia-like family, and they set out to eliminate the threat to their bloodline. Faced with imminent danger and the prospect of living a fishy married life, Nagasumi's only hope lies in convincing Seto and her menacing entourage that he deserves to be spared. His struggle to win their approval forms the crux of this comical love story.

Throughout the episode, Nagasumi hilariously tries to adapt to his new life as a fisherman's husband. Seto's family, especially her overly affectionate mother Otose, eagerly watches his every move, ready to strike at the first sign of weakness. Nagasumi's attempts to please his new in-laws become increasingly absurd, as he must navigate the challenges of mermaid society and its strict protocol. From cooking peculiar seafood dishes to enduring unusual family rituals, Nagasumi finds himself in one peculiar situation after another.

While Nagasumi dreams of living a peaceful life on dry land, the yakuza mermaids have other plans. During a rooftop confrontation between Seto and a rival gang, Nagasumi's unwavering loyalty to Sun earns him respect from the mermaid community. This newfound admiration catches the attention of an unexpected ally — Masa, Seto's father and the former leader of the Seto Group. Masa, recognizing Nagasumi's bravery and loyalty, secretly aids him in his quest to survive the tumultuous mermaid life.

As the episode draws to a close, Nagasumi's persistence and willingness to go to any length to protect Sun begin to win over his in-laws. Seto's family members, despite their tough exteriors, soften towards Nagasumi and start considering him as a potential ally rather than an obstacle. This newfound acceptance offers a glimmer of hope for his future as a member of the Seto family.

"A Yakuza's Wife" effectively establishes the humorous and fantastical world of My Bride is a Mermaid from the very first episode. Filled with vibrant characters, outrageous scenarios, and heartwarming moments, this anime blends comedy, romance, and action in a delightful and unforgettable way. As Nagasumi's journey in mermaid society continues, audiences can eagerly anticipate the adventures, mishaps, and, above all, the blossoming love between a teenage boy and his aquatic bride.