Nanamashi

Nanamashi is the fenslash ship between Nanami Hiromachi and Mashiro Kurata from the BanG Dream! fandom.

Canon
In canon, Mashiro and Nanami are both band members of Morfonica, and both go to Tsukinomori Girls' Academy. Nanami is the bassist, and Mashiro is the lead singer. Despite being in separate classes, they make time to spend time with one another in and out of school, and with the band. Nanami is also known to harmonise easily with Mashiro through area conversations. Nanami also gives Mashiro the nickname 'Shiro-chan', however this is not uncommon for her to do.

Fanon
In fanon, the ship is small, Morfonica not having the biggest fans within the BanG Dream community, and with Morfonica only being out in the world-wide servers for a year less than in the native Japanese servers, not a lot of hype is given, and even less on the ships. Nanamashi is overshadowed by Nanarui in popularity.

It is headcanoned that the song Secret Dawn is a duet of Mashiro and Nanami, as Nanami comments on how the lyrics come to her – comparing with Mashiro.

Fandom
AO3 link to Hiromachi Nanami/Kurata Mashiro

Trivia

 * Nanami and Mashiro are opposites — Mashiro being a regular girl who strives to be unique and, and Nanami is a girl like no other, who's wish is to be like most people.
 * Nanami calls Mashiro cute in a summer area conversation.