To the person asking to remove the Costume Swap tag, that's there because on the last page Iroha swapped outfits with Stelle from HSR
Wait, staff can't see who requested tag changes? rubs hands mischievously
Anyway, looking at how that tag is commonly used, it's usually of the sort "wearing your gf's clothes" or otherwise has both participants present and, well, swap their costumes. (Even when cross-franchise: Ex. 1, Ex. 2.)
But when you have somebody simply dress up as another charactar from another franchise, that usually falls under cosplay. Ex. 3, Ex. 4, Ex. 5.
In the end it's up to staff discretion, I'm just pointing out how those tags have been used in the past and thusly imbued with meaning.
last edited at Mar 16, 2026 5:08PM