If you're looking for manga similar to Boruto: Road to "B", you might like these titles.
Rakudai Ninja Rantarou is about a boy who wishes to become a chou-ichiryou-ninja (aka, the number one ninja). There is only one problem: he keeps failing. Together with his friends, they encounter mishap after mishap as they seek to eventually graduate from the first grade.
In the Hidden Leaf village of Konohagakure, there’s a hot-blooded ninja in town! Rock Lee is an energetic boy, whose complete and utter lack of talent in using ninjutsu techniques has given him an unstoppable belief in hard work and self-determination. Driven by his admiration for his teacher, Guy, Lee trains day and night to become the strongest ninja despite his inability at the most basic ninjustu. But even outside of his missions, whether he’s trying to beat his rival, or attempting to confess to the girl he likes, Lee stampedes through life at full-throttle never letting anything slow him down.
While out on the road, a young feudal lord named Chiyozuru stumbles across a girl laying unconscious in a stream named Henpukumaru and offers her a place to stay. Soon after her arrival, one of the young lord’s retainers, Gen’ichi, discovers that Henpukumaru is in truth an member of a ninja assassin group known as the Tekken who fled when she decided that she couldn’t kill any more. Having convinced him that her violent past lay firmly behind her, Henpukumaru begins to live a quiet life at the mansion. But when Choyozuru’s life becomes endangered, with the tentative assassin be able to return tp her old ways and protect her friend’s life?
The story of Minato Namikaze (Fourth Hokage), the winner of the world-wide popularity poll project—NARUTOP99! Just how exactly did Minato, the father of Naruto, develop a certain jutsu...?