Back in high school the MC played the part of the prodigal son, but was actually bored with life. To alleviate his boredom he made it a hobby to blackmail people. He lost student council president to (what appears to be) the seme and later the seme revealed his true nature as a fellow (possible?) deus ex machina. Since then the MC has harbored feelings of... excitement (?) towards the seme and their re-encounter has him taking up the seme on his offer of sex only to later offer the seme a place as his pet. The two seem to be playing mind games and mentally butting heads, it looks like it'll be a good read.
Flaver