given how overly dramatic and angsty people say volumes 2 and 3 become, I'm going to stop reading after volume 1 because I think there's at least a happy ending from what little Japanese I know...idk ┗( T﹏T )┛
for people that want the link: http://imgur.com/a/5H3w5 (links for vol 2 and 3 are further down in the comments)^^
for everyone who's confused by the age difference not adding up, I read the raws and what seijiro (older dude) said was that ryou (high schooler) has a likeable way of doing things/demeanor that doesn't make him (sei) feel the difference of being a zodiac cycle (一回り hitomawari) apart in age and ryo got really close to him because of it. so sei didn't actually say that they're exactly twelve years apart in age, but kind of like there's at least 12 years between us