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...
It's already been a week since 
the day the angel flew down.
Seit an jenem Tag dieser Engel zu mir herabstieg,
Ya casi se cumple una semana
desde el descenso del ángel.
Ya casi ha pasado una semana
desde el descenso del ángel.
Cela fait déjà une semaine
È già passata una settimana 
dal giorno in cui l'angelo è volato da me.
Já passou uma semana desde o
dia que aquele anjo veio até mim.
С того дня, когда мне явился ангелочек,