Hokage: My Husband Tsunade, Uniting Leaf

Who understands this family situation! Waking up at the start, I find myself before the mobilization and oath-taking for the Second Great Ninja War! (Konoha Year 32) I, Uchiha Owl, am an 18-year-old graduate of the same year as the Legendary Sannin. With only a single tomoe Sharingan and a few C-rank ninjutsu, what's the difference between this and a death sentence? Ding! System activated. The Strongest Ninja System is bound. Please complete the system-assigned missions. Upon completion, you will receive massive rewards. Uchiha Owl's eyes lit up, "Is there a beginner's gift package!" Ding, yes…