Sinopsis
"Are you planning to stay with me until one of us dies?!"
Minami wins a pair accommodation voucher for a luxury resort in a lucky draw, and is forced to go with Saibara whether he likes it or not. Minami is genuinely excited about their first trip in ages, but while they're there, they unexpectedly run into Saibara's father, who starts asking questions about their relationship. Minami still can't put a clear label on what they are to each other, and it ends up sparking a huge fight between them...
(Source: Kadokawa, translated)