[No romance, no heroine, no playing nursemaid or sucking up. He acts decisively.]
Qin Lan, who lived in a post-apocalyptic world, transmigrated to the Naruto world after his planet exploded, taking over the body of a man named Yamamoto Kurosaki. He also brought along a digital panel, the supernatural ability he had awakened in the apocalypse. Unfortunately, he transmigrated before he had a chance to use it. So what was the most powerful thing on that digital panel? Kicking techniques. At their highest level, a single kick could shatter a star, though that was a story for another time.
(PS: If you don't want a harem story with a female lead, you're in luck. The women who spend time with the protagonist are all just shop clerks, with no flirting whatsoever. If you don't like an indecisive protagonist, you're in luck there too. The male lead always pays back his grudges. Hesitating for even a second would be an insult to his kicking skills. If he can kick, he won't waste his breath. The Boruto storyline will also be changed considerably. People like Kawaki will most likely get killed off, so don't read this if that bothers you.)
Kurosaki: Have you ever been kicked at the speed of light?
Danzo: What?
Some Otsutsuki: I can brag for the rest of my life about surviving that kick.
Otsutsuki God: Which bastard tricked me into coming here? I'm done for.