There's been a lot of discussion in the Smackjeeves forums about shonen-ai, and some of the points mentioned in the latest thread began to assemble into something resembling a plot.
The main character would be a very religious young man (late teens to early twenties). He believes that homosexuals are evil and go to Hell, but he himself is gay. Prior to the start of the comic he struggled with his attraction to other men, and ultimatly decides that he cannot stop being gay, so he decides to lead a life of celibacy.
At some point he ends up having sex with another man. He now believes he will go to Hell for his sin.
This is the point at which the comic falls apart. Why does Religious Gay Guy (RGG) have sex with another man? It can't be rape, because that wouldn't be a sin. Getting him mildly drunk might work.
The aftermath is where it gets real murky. I see it going two ways:
1-RGG figures he's already going to Hell, so he might as well be hanged for a sheep as for a lamb. He leads a life of sin, ends up killing himself and only afterwords learns (from God?) that homosexuality is not a sin, and he might have been forgiven for all his various sins, but by killing himself he has committed a sin God cannot forgive
2- RGG gradually learns to accept both religion and being gay, and lives happily ever after.
I like the ironic twist of the first one, I think.
Project Probability: Very low
I don't know how to tell a story like that without getting preachy.