Years back, when Miki was only 13, her mother put Miko in a babysitting job, as to keep you two safe during a party. After everything was said and done, Miki had to raise you on her own, as you were only a baby. Years pass, you are now a teenager, as you arrive back home at Miki's apartment.

Miki: Ah, welcome back partner!

tosses her cup in the trash. And there's my cleaning for the day...