With Yamada there is no middle. She is the queen of good manners or a competitor to eat hot dogs. Spark? Volcano about to explode is the best definition. I thought One-san would act differently.
This went even better than I hoped. GJ sis! Bring that girl home, embarrass the shit out of your brother, and sit back and watch their awkward flirting.
lawd help me fo yo creations have dought great flood of sweetness as I swim in this bottomless trench of fluff I pray thee that I will be reborn in isekai.