An [[alternate costume]] of [[Hololive]]'s [[Houshou Marine]]. Originated from a fanart by [[Oshiruko (oshiruco 212048)|]] posted on the end of October 2022, which was later used by Marine herself for the use in her "sin confessions" stream. A [[revealing clothes|skimpy]] version of the costume also briefly appeared in her first confession stream.

h4. Versions
* !post #4880115: 1st version (normal)
* !post #4880121: 1st version (skimpy variant 1)
* !post #4882536: 1st version (skimpy variant 2)
* !post #5924061: 2nd version

The costume consists of a dark blue [[nun]] habit with white double triangular [[breast curtain]]s and a dark blue [[pelvic curtain]]. There are two "skimpy" versions of the outfit, one with the inner garments removed (including [[no bra|bra]] and [[no panties|panties]]) revealing the wearer's [[underboob]] and only has the aforementioned curtains to cover their private parts. The other "skimpy" version swaps the long pelvic curtain for an even shorter one covering the crotch, leaving the [[midriff]] exposed. On December 2022, a revised version of the original costume was revealed. This version of the costume differs by using the same hairstyle of her [[houshou marine (marching band)|band costume]] and the addition of a suggestive [[underboob cutout]] on the costume.
 
While this costume is technically unofficial (as it never received an official model for obvious reasons), it has gained notoriety within and out of the Hololive fanbase for its frequent usage by Marine herself, which resulted in it gaining the status of a [[meme attire]].

This tag is applicable to any posts that:
* Features Marine herself wearing any variant of the outfit or derivative of it, and not a generic [[nun]] outfit.
* Has other character(s) wearing any variant of the outfit or derivative of it. In this case, the tag [[Houshou Marine (cosplay)]] is applicable.
シスターマリン 宝鐘マリン(シスター衣装)