Gakuen de Jikan yo Tomare (Gakuen de Jikan yo Tomare (学園で時間よ止まれ))

The bastard son of a rich aristocrat is hellbent on seeking revenge ever
since his father abandoned him and his mother. He decides to teach his
father a lesson by destroying what he treasures the most, his two
daughters. He infiltrates their prestigious school with a magical
time-freezing device he received from a witch – and proceeds to
repeatedly rape his half-sisters, leaving them confused, helpless and
begging for mercy.