Name: Boukenka ni Narou! ~Skillboard de Dungeon Kouryaku~ (冒険家になろう! ~スキルボードでダンジョン攻略~) Ncode link: https://ncode.syosetu.com/n8618ef/ LN link: http://www.futabasha.co.jp/booksdb/book/bookview/978-4-575-24107-5.html?c=32600&o=date& Why It Should Get Picked Up: Good and interesting modern world with fantasy elements story Description : Karaboshi Haruki, an adventurer with a small presence, returned to his home from the Chi-Ka-Ho dungeon in Sapporo, only to find that his garage has transformed into a dungeon. At the dungeon's entrance, he discovers a mysterious slate. Coud it possibly be a Skillboard? Taking the Skillboard, Haruki goes into the dungeon. Now with the Skillboard, Haruki aims to become a high Ranker so he can be a more noticeable person! Or so it was supossed to happen, so why does he ends up being the suspicious masked man Jagaimo (ジャガイモ)!? Will it be possible for him to capture the dungeon as a "decent" person? LN Cover: Manga version link (Raw): http://webaction.jp/Mcomics/
It's simmilar to Everyone's else is a Returnee. The MC even has same stealth skill which make him unnoticeable by everyone. It's pretty funny with the interaction between him and the other adventurers.
Since nobody seems to pick it up, I'll try translating it by myself. At the moment the prologue is about 50% translated. Will take some days till I set up a site to post it though.
Finished translating the prologue and posted it here(new user here, so I can't add links): shujinkou[DOT]com. Updates will come slow but steady. Have fun.