Hyouketsu-kei Koso Saikyou Desu!: Chiisakute Kawaii Shishou to Kekkon Suru Tame ni Saikyou no Majutsushi wo Mezashimasu

The Hermes family has produced many talented magicians. However, it turns out that only the third son, Frey, has an aptitude for the ice attribute, which is unpopular in modern times. As a result, Frey is scorned by those around him and banished from the Hermes family. "I'll show them... I'll become stronger," Frey resolves, and meets a lovely girl. However, she turns out to be none other than Arcelia, the Sage of Ice, one of the Seven Sages who saved the world. In order to become the world's strongest ice-attribute magician, Frey looks up to Arcelia as his master, but before long, his feelings turn to love. Will he even propose marriage?!

(Source: Young Champion Web, translated)