Kuudere Sugiru Mirai no Yome no Mendou na 7-kakan

I picked up what appeared to be a runaway girl. Next to a cigarette vending machine in a convenience store.
Katsuki Hira thought that if he leaves her alone, she will get into trouble, so he reluctantly takes her home to protect her, even though he thinks it is troublesome. When he asks her why she ran away from home, she evades the question with jokes. Eventually, the two open up to each other over the course of awkward conversations, and he agrees to let her stay for one week only.
After a week of the strange cohabitation life, the two will…
(Source: Osiris Bunko, translated)