Responses
I asked before and someone told me it's a doujinshi. I tried to search it at myreadingmanga but only found something similar to that: https://myreadingmanga.info/araiguma-no-levi-shingeki-no-kyojin-dj-jp/.
Hey Tanuki Levi isn't bad at all heheh
http://www.mangago.me/read-manga/fushidara_na_hanatsumi_otoko/mi/099e3966120641c6472c6cb93c8b6403_chapter-1/29/