Shy college student and otaku Miyako lives at home. One spring day, her little sister, Hinata, brings home a new friend she made at elementary school. From the moment Miyako sees Hana-chan, her heart won't stop racing! Desperate to make friends with the angelic Hana-chan, Miyako uses her skill at making sweets to try to lure her in, but...
Onee-san, you sleep with 
Hinata a lot, don't you?
Du schläfst oft mit Hinata zusammen, oder?
Duermes a menudo con ella, ¿no es así?
Duermes a menudo con ella, ¿no?
Miyako, vous avez survécu
en dormant avec elle ?
Miyako, tu dormi spesso con Hinata, vero?
Moça, você sempre dorme
junto da Hinata, né?