Original author Marumo (マルモ) https://www.pixiv.net/users/19666441 https://twitter.com/GTSYear
A fully colored and oficially translated version can be read by subscribing to Marumo's fanbox (https://marumo.fanbox.cc/). A new story has also been recently released for purchasing which appears to be a continuation/new story
I'm currently working on translating all of Marumo's works from their pixiv, but I though this story had enough weight to be it's own gallery
Translated by me. I'm not a native English speaker and I'm still learning japanese, so excuse me for any misstranslation or syntax error!