Review Detail of Yardigan in The Great Swordsman in Naruto World

This is so good, I like the fact that he maintains the mindset of someone his real age, and like Daoist_Dan commented, a lot of red flags have been ducked, the only thing that can mess this up is bad romance or harem. Speaking of romance, author if you do decide to go the romance route or add it, is it gonna be a single love interest or harem(2+)?