I'd say a must read but because it doesn't end and it just leaves you wanting more it leaves you sad and unsatisfied. Wish there was more.
I just finished this one and it looks like there is a sequel. I haven't read the sequel yet, but hopefully it has a better ending: Thunderbolt Boys: Excite. http://www.mangago.me/read-manga/thunderbolt_boys_excite/
I want more! So much more! But I guess the story couldn't really have gone much further anyway. But still loved it!
How? How? How? I... I can't even.... I just.... WHY?
I wanna know how his counselling went and who he choose if anyone... Come on man!
Without a definite ending on who he chooses really makes me feel at lost too. Oh gosh!
The shortness of these chapters makes me unhappy in my pants :p.... But seriously, I want longer chapters :(