Yep it was quite tragic how little his sacrifice amounted to.
that's ok if you ever want to check whether a manga on here is licenced you can go to http://www.mangaupdates.com and type in the title of the manga in the search bar and then when you open it you can scroll through to find out all the relevant information such as status, related works, author and licence situation
https://www.emanga.com/detail?itemid=1505&returnurl= https%3A%2F%2Fwww.emanga.com%2Fsearch%3Fauthorid%3D5
You will find it on emanga,
Blue Sheep Reverie Vol. 6 there is 8 volumes but 6 in english
he did what kai did for like 2 years and got nothing in the end how sad