Ke Xue, Take APTX4869 at the Beginning

Li Suyi traveled back in time to a rich man with terminal cancer, and Hayasaka Ai was by his side as a maid! I thought that was the end of the story, but I didn't expect Sister Bei to suddenly appear in the ward and feed him a magical little pill: APTX4869. The medicine failed, the system came out, and Li Suyi became a young boy again. Later, I learned from the endlessly active memory fragments: Fujimine Yukiko is actually his childhood sweetheart, and has he ever rejected his confession? Hayasaka Nao and her son have been looking for opportunities to have sex? Fei Yingli and Yukiko were love rivals, and they fought for her together? Has Mrs. Yukinoshita been waiting for her to look back? … Came to Japan from the United States, became classmates with Xiaolan, became friends with Yukino, rescued the Miyano sisters, and took revenge on Sister Bei... In the end, based on the Hidden Guard, an immortal organization was created that shocked the world. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.