Ema Hinata, a high school girl, moves into the Sunrise Residence apartment complex after her father remarries Miwa Asahina. What she does not expect is to find herself living under the same roof with thirteen stepbrothers, each with a distinct personality and occupation ranging from a priest and a voice actor to a pilot and a college student. This chibi-style spin-off manga, based on events from the second season of the original light novel series, reimagines the entire household in super-deformed, four-panel comic format. The brothers, tiny and round with exaggerated expressions, chase after Ema and compete for her attention in a series of short, gag-driven episodes. The humor derives from the absurd contrast between their usual mature appearances and their childish, squabbling chibi forms, as well as from the chaotic domestic situations that arise when thirteen brothers all try to win the heart of the same girl. The narrative does not follow a single continuous plot but instead presents a collection of comedic vignettes, each riffing on familiar moments from the main story and amplifying them with slapstick, misunderstandings, and exaggerated romantic rivalry. The only recurring through-line is Ema's daily struggle to maintain peace and normalcy in a home where every brother is determined to prove he is the one for her, all rendered in an ultra-cute, playful art style that prioritizes laughs over drama.