Is Junko thinking about all the return presents she'll have to give to Hecatia(s)? I can see three being for her birthday, three being for Christmas (maybe?), but what would be the third?
The presents Hecatia is giving is Valentine's chocolate, so maybe Junko is concerned about having to give presents on White Day?
Here, Junko!
Gasp
It's Valentine's chocolate!Heh heh...surprised?This is the Triple Chocolate, yours truly's Valentine's specialty!Junko shuddered in fear.Savor it even if you die! (?)Wow!Thank you, Hecatia!How wonderful to receive three people's worth of chocolate!I'll have to return the favor in plenty for White Day...Wait...? You give back triple for White Day chocolate...which means......I'll have to give back 3x3=9 times the chocolate!?