Aitsu No Heart Ni Hi Wo Tsukero!
Complete | Mizuna Mai | 2003 released
the story pacing felt rushed, as the did the character's feelings. But it was an interesting concept. Haruto could have been more fleshed out in terms of a personality. If the mangaka had had more time, this could have used some more backstory on all the characters.
Hisho to Yajuu
Complete | takahashi yuu | 2006 released
Actually I think the President is somewhat of a bastard, but I guess he fits the "possessive seme" trope.
Utsukushiki Kemono-tachi