The Titan's Bride (2020)
Original title: 巨人族の花嫁
The Titan's Bride is a 2020 Japanese-language animation series. It stars Kent Ito, Noriko Fujimoto and Yuki Ono.
Koichi, a student about to graduate, is summoned to a world of Titans. It's the land of Tildant, where the prince, Caius, appears in front of Koichi and says, "I want you to be my bride and give birth to my baby!"