Procella's Yoru Nagatsuki and You Hazuki are childhood friends whose families have known each other for generations. Their personalities, preferences, strengths, and weaknesses are opposites, leading them to sometimes drift apart. However, as they continue to work under Procella, the two of them are true partners. They've spent most of their lives together. They can tell each other things too difficult to say to others. And because of that relationship, they sometimes clash... This is the, in a sense, same old story of an argument they have during a dance lesson while preparing for the Full Moon Festival.
Then let's keep this late-night 
tea party our secret.
إذاً لنجعل حفلة الشّاي الليليّة هذه سرّاً
Dann bleibt diese
nächtliche Teeparty
Entonces esta fiesta nocturna
será un secreto entre los tres.
Entonces, esta fiesta nocturna
será un secreto entre los tres.
Du coup, on va passer sous silence
ce petit goûter.
Allora questo tè di mezzanotte 
rimarrà un nostro segreto.
Então este chá da noite
é o nosso segredinho.
Тогда пусть это чаепитие перед
сном будет нашей тайной.