ホルマリンの海 (Formalin no Umi)

Background
This song was uploaded on October 21st, 2012, and has reached over 40,000 views in Nico Nico Douga. It is also one of Mayu's demo songs.

Deadball-P stated that since EXIT TUNES's new vocaloid was Yandere, he wanted to make a Yandere-esque song.

This song is featured in the EXIT TUNES Mayu only compilation album MAYU SPECIAL 2CD.