One day, Hinako returns from school to find a letter from her mother. In it, her mother says she'd be visiting Tokyo to see Hinako acting. But Hinako is worried that she'll get nervous and freeze up like a scarecrow if she knows her mother is watching, not to mention she hasn't appeared on a stage since the culture festival. She even gets embarrassed just being seen working at the Hitotose coffee shop. Then she finds out about a stamp rally event planned in the shopping district, and she suggests having their troupe perform at Hitotose for it.
By the way, have you heard of 
this school's seven mysteries?
بالمناسبة، هل سمعتن بألغاز هذه المدرسة السّبعة؟
Habt ihr eigentlich von den Sieben
Mysterien unserer Schule gehört?
¿Saben las historias sobre
los siete misterios de la escuela?
¿Conocéis las historias
de los siete misterios del instituto?
A proposito, conoscete 
i sette misteri di questa scuola!
Aliás, você já ouviu falar dos
 sete mistérios dessa escola?
А вы слышали о семи 
тайнах этой школы?