The New Star Trigon

The New Star Trigon (ニュースタートリゴン) is a Japanese anime series created and written by Susumu Takajima, and is the current arc of The Drillimation Series. The series is set 20 years after the events of Mr. Driller Drill Spirits, and follows the adventures of Tetsuo Izumi-Hori, who is the son of Susumu Hori and Konata Izumi. He befriends Risako Takara-Hoshi, who is the daughter of Wataru Hoshi and Miyuki Takara.

Backstory
The backstory begins after the defeat of Dr. Manhole. Konata Izumi is declared as the next monarch of the Lucky Star Kingdom but realizes she cannot win the spot until she marries Prince Susumu Hori. Later, Lord Soujirou becomes impeached and overthrown for wrongdoing and being abusive to his daughter Konata again. Giving Konata the open spot, she wants to be married and coronated at the same time.

In a forest of cherry blossoms on one sunset, Konata meets Susumu there and tells him that she is moving away to Nagoya and wants to give Susumu a farewell gift. The gift to Susumu ends up being an engagement ring, with Konata asking Susumu to marry her. Within a matter of weeks, Susumu and Konata become married and become the new monarchy of the Lucky Star Kingdom. As a result of the marriage, Susumu is forced to move to Nagoya as well.

Childhood friends Wataru Hoshi and Miyuki Takara also become married and move to Nagoya as well. Within a year of their marriage, both couples have their first child, that would later be Tetsuo Izumi-Hori and Risako Takara-Hoshi.