For the neutral side,
featured are: (standing row L-R) Ono Daisuke, Kaji Yuuki, Kamiya Hiroshi, Miyano Mamoru, Nakamura Yuuichi
(sitting row L-R) Hanazawa Kana, Toyanaga Toshiyuki, and Sawashiro Miyuki
DRRR!!'s seiyuu event from Youtube:
for the OTOME SIDE:
SCREAMING UTA NO PRINCE-SAMA!
(L-R) Suwabe Junichi, Taniyama Kishou, Miyano Mamoru, Suzumura Kenichi, Terashima Takuma, Shimono Hiro, and Toriumi Kousuke
and a video from their first seiyuu event, singing their track B song from their Maji Love 1000% single, Mirai Chizu
(Note that Toriumi Kousuke's not in the video.)
Do I even have to explain why I selected these series?
I am really into male seiyuu, try observing the number of male seiyuu in Durarara!! and K Project...
I am not good in distinguishing female seiyuu, unless she's been a part of romance-themed anime or the she's the one who voiced the heroine of a certain reverse-harem anime.
I don't usually watch harem anime since it is filled with explicit fanservices.