Sen no Sukiru o Motsu Otoko

Hinoharu Kota is bored with his life as a middle-aged office worker, and his marriage with his new wife is beginning to strain. One day, he is accidentally summoned to another world as a beast summon. Fantastically, each time he is summoned between worlds he obtains a new skill. Soon, he finds himself contracted with a female knight. Where will his growing powers and adventures between two worlds take him?!