Ore no Otouto ga Konna ni k(ry

Takayoshi is the eldest Koyama brother, and years of running the household while the parents are off doing whatever parents do elsewhere have made him a genuinely competent housekeeper. That skill set gets tested when the neighboring Nakadachi family's parents leave for an overseas job and Takayoshi inherits their kids too, on top of his own brothers.

What follows is a full house of siblings, near-siblings, and honorary siblings all under one increasingly crowded roof, with the family-next-door closeness curdling into something else once everyone's stuck together day and night. The story branches toward different pairings and endings depending on who Takayoshi ends up paying the most attention to.

Play is standard visual novel territory: read, pick who you spend time with, watch the household dynamic shift accordingly. The cast leans heavily male, with the game's own tags making no secret of that, and the voiced scenes carry more of the weight than the writing does.