Shuuya is your typical broken and reckless kid (I say he's a kid because that's how he's referred to in the story but he's in his early twenties) who uses sex as escapism, fucks whoever, whenever way too carelessly and has that weird sort of sex appeal that attracts men.
Even though his character is a typical sort, even seeming superficial and one-dimensional, don't dismiss him as boring or having no depth. I really enjoyed seeing his character grow through the story. He has a childish sort of personality but he's earnest and pure in his feelings and how he worked hard and cared for Sawaragi was really sweet.
Sawaragi is a cool, composed character and actually quite attractive in the rough and gruff sort of way. (the ultimate manly seme haha) But the thing I like about him is his maturity. It's refreshing to see an older yaoi character who is GENUINELY mature and actually acts (and looks) like his old age.
Overall, it's a nice story with enough angst, sweet moments and enjoyable character interactions. It gets a solid score of 8 from me, would recommend it to any fan of the yaoi genre!
