The siblings try their hand at internet streaming. Later, Iyami uses an experimental detergent to keep his suit clean, but it's drunk by the siblings and makes them invisible.

Noticing Matsuzou acting strangely, the siblings discover that he is worried that there's not enough spark in his marriage with Matsuyo. Feeling he should return to a more innocent time, the boys give Matsuzou a masterlcass in being a virgin, albeit with no success. Matsuzou inevitably resorts to getting a love potion from Dekapan, but ultimately decides against using it, managing to sort things out with Matsuyo by himself.

Jyushimatsu befriends a young boy named Eitarou but gets called in by Eitarou's mother when he starts imitating him. Contrary to Jyushimatsu's fears, however, she asks him to teach Eitarou jokes so he can make friends at school. Later, Dayon steals Dekapan's underwear, forcing him to give chase all over the city while butt naked.

The brothers get rowdy while getting drunk at a restaurant. Unemployed office lady Totomi ends up taking a job at a strange establishment that offers some peculiar services. After being visited by a salesman, Matsuyo contemplates sending off one of her sons to a NEET correctional facility, asking Choromatsu to help her decide which one to send away.

Osomatsu's big announcement to his brothers is interrupted when Iyami crashes a plane into their house, killing them all and sending them to the underworld. Brought before King Enma, the brothers fail to come up with a good reason why they should go to Heaven and ultimately wind up in Hell. Just as the brothers realize they are still virgins, Totoko and the others, aided by the spirit of Fujio Akatsuka, dive into Hell to bring them back. Receiving further help from other dead allies, the brothers manage to escape Hell and return to life, although they are not exactly happy with the state of their bodies.