Responses

Only thing that is against this theory is that Yuuji said: "Were you lonely too? When you were alive..." If we assume that he hit the bullseye, then that means Kousuke is really dead. But Kousuke didn't answer to this question, so...there are still possibilites. But the fact that he didn't answer could also mean that it was true...hm.....
Some points I only just realized after Ch. 3...
1. So...Kousuke is actually a dead person? Wow...I didn't even think of that. They were only titled as sex ghosts before...so I thought they were supernatural beings born out of nowhere. That suprised me... now I want to know what caused him to die.
But seriously...he can touch persons and things and all... the only difference is that he can make himself invisible, he can float...and he can control other persons. Ah and apparently his body is cold, because he is dead...of course. So it's no different from a living being...just with extras....xD
2. I didn't know that he was THIS young...but now that Yuji said it...yes he really wears a student uniform...I didn't realized it! Shame on me !T-T So he's younger than Yuji...nice....
But why did he die so young?! I want to know how that happened.. :( And I want the answer to the question Yuji asked..."Were you lonely too?" T__T