Even If You Are Bound to Die, Are You Willing to Travel Through Time to Save Me?

[Multiple Time Travels] [Single Heroine] [Pure Love] [System Girl] [Bittersweet Sword] Chen Lan was reborn and returned to high school with a system. This system will not trigger any functions in his daily life. The only function seems to be to pull Chen Lan into another timeline every once in a while, a timeline where his childhood sweetheart Shen Wanqiu will die at any time, and give him some skills to save her. It just so happened that he was determined to make it up to her in his new life. He owed her a life in the previous life, but saved her several lives in this life. So a thousand times, Chen Lan wanted to save Shen Wanqiu. Can it really be saved?