Dornenkrone Braut -Keikan no Hanayome-

The protagonist is sexually trained, and gets involved in a romantic relationship. In the process, he learns about the secret of his birth, as well as the riddle of the mysterious 'matrimony'. There are 3 + 1 characters to capture. There are 5 endings, and the event CG counts 52 images (including variations). Features sexual insult, training, romance, adultery, divorce and marriage.