
define of cheat in this story is very vague, Uke is vampire, he need ate blood or come of man, like we need food everyday. seme needs to return home five days, that mean uke has been fasting for five days. to the fifth day, seme call delay, he can't come back. Uke verry hungry, so he catch radom guy, but in the end, uke didn't sleep with him, it must be seme, it cannot be anyone else.
I don't like uke sleep around before he meet seme (he can just blow job, don't need to sleep with others, right?) but in this situation, you can say uke cheated or not ^^

don't get me wrong, I also don't like the way uke acts. but uke blow job and have sex manytime, so, you know, something repeated so many times will a natural thing, maybe with uke, sex don't big problem. Drinking blood is a greater sin with him, uke can drink a little from each person, he will never need man's come.
Of course, uke know he wrong, he don't sex with guy in hotel, and he feel guilty with seme. Once again, althought I don't like uke, but when he cheated, he feel guilty and stop right there, he better than some uke/seme in other mangas I read, they cheated and don't feel guilty.
I don't understand the favorite of the translation team, so much one night stand, ex boyfriend, have sex before meet true love. what's wrong?!
I miss heartwarming, comfort, I miss Hidaka Shoko sensei (Restart, Hana wa Saku ka), I miss Hidamari ga kikoeru, I miss My Precious (big cry)
Funny how they never said he 'cheated' when that's exactly what he did - just brushed it off