Phantom Invasion, Vol. 1

Ryo wakes up one day to find himself transported to another world full of monster girls. Although their power far surpasses that of any humans, Ryo has his own ability-the "Charm" skill, which forcibly increases his affection level with all monster girls! Using this skill, he seduces all kinds of monster girls and builds a harem to get revenge on all the fantastical creatures that attacked and brought his home to ruin...!