[Light Novel + System + Multiple Heroines + Healing]
Shan Jingxun transmigrates to a parallel-world Tokyo and awakens a System while still in elementary school.
He resolves to live a successful life, only to discover later that the System is useful only when he gets close to beautiful girls. Worse, the damn System has capped his lifespan at twenty.
After spending the first nineteen years of his life without meeting a single girl the System recognizes, Shan Jingxun finally encounters his destined girl on a train in Tokyo.
With only seven days left to live, the boy has no choice but to get close to a beautiful girl if he wants to survive. (Sigh)