Responses
nope ... but Fuufou summarized it on her tumblr :
http://fuufou.tumblr.com/post/141319396207/masato-sama-no-urei-aru-nichijou-to-kare-wo
He's Nanao's cousin. He's introduced here: http://www.mangago.zone/read-manga/mujihi_na_karada/mf/v01/c001/12/
The translation is in here http://www.mangago.zone/read-manga/masato_sama_no_urei_aru_nichijou_to_kare_wo_aisuru_monotachi/
http://www.mangago.zone/read-manga/mujihi_na_anata/mf/v01/c001/8/
Does this other guy here have appeared somewhere on other Sakuraga Mei sensei's work before? he appear as if it's not his first time (with no introduction and stuff)....... and then later on the 5th chapter, he's known as 'Masato' (is what I think).......
I'm kind of all out at this Warui series..... so I'm very curious, you see.........
Hehehehe.......
╮( ̄▽ ̄)╭