[Crossover] The Vongola Family's Old Chinese Medicine Doctor

There are two people Tsunayoshi Sawada will never forget. One is his home tutor, Reborn, the world's number one hitman. The other is the Wanhua Valley disciple standing right in front of him, sticking him with a needle. The first stripped him naked and made him run in front of the girl he had a crush on the very first time they met. The second grabbed him and took him on a tour of Maple Valley's beautiful scenery the first time they met. The young and promising Tenth Vongola Boss figures he must have destroyed the world in his previous life to end up meeting these two. This is a 1v1 story, with 270 as the male lead. Early on it's a JX3 hunter and YYS; what comes later, you'll have to guess [gets beaten]. The heroine has a split personality, is absurdly powerful, and completely deranged. The story balances plot and romance. 270 will gradually help the heroine get over her verbal tic from the early chapters. The author has quit JX3 but still keeps an eye on it. My knowledge only goes up to the 90s, and since I don't play Chang Ge, the heroine is set up as a dual-cultivation Wanhua and Wudu player. As for the timeline and plot holes, the author has completely let go. Premise: