コスプレダンスパーティーで
kosupuredansupātiide

Noun
Da Copula

て-form: Used to connect clauses, make requests, or chain actions of コスプレダンスパーティー

1. Cosplay dance party at/in.; ; Connecting clauses about a cosplay dance party at/in.; ; Requesting something related to a cosplay dance party at/in.; ; Chaining actions happening at a cosplay dance party at/in.

Te-Form