Cain Osugi [1], "Cane" in the English dub, is a fictional character from the Lovey-Dovey Fantasia[2] dating sim video game in the original manga and a romance anime series in the sequel manga.
Both Risa Koizumi and Hiyori Manabu are obsessed with the series, and have both noted how similar Maity-sensei looks to Cain-sama.
Cain is voiced by Daisuke Kirii in Japanese/Charles White in English.