Even though the ending was kinda good, why did tsubasa forgive the seme so easily for his ...

I read this over 10 years ago. With a very young lens, I just accepted this story (because everybody had flaws right, nobody's perfect) and enjoyed it. Now, I got to re-read the story with much acquired maturity and I gotta say, this story is actually very disturbing. Pedo-ish content aside, Tsubasa accepted cheating, lying, manipulating, conniving ass of a partner (Eiji), who can screw him over anytime Eiji wanted. I was so sad about that. Because Tsubasa was so innocent and naive, he felt that the burden of blame was on him (he was inadequate, a 16 year old could not commit to having sex with a 35 year old). Sigh