Orcsoft - Iku Iku Succubus Final - Adult Sex Game

Overview:
Tanehisa Busujima is a middle-aged university professor well known for his lack of restraint and speaking his mind
(for better or worse).
His compulsions have put his job in jeopardy.
The university's president provides him with a lifeline, though:
Serve as an instructor for study abroad students from the Succubus Kingdom