For students of Honkai Impact Railroad 13, you may have some questions if you want to get the hidden achievements of Honkai Impact Railroad 13. Therefore, we can refer to "How to Obtain the Hidden Achievement Cross Road Rebirth/Reciprocation in Collapse Star Railroad 13", which may be able to give you some help.
This task is a branch achievement, that is, choose 1 achievement from 2, and only one of them can be obtained. You need to complete the prerequisite task "Todd Riordan's Academic Research: Continued" first, and then accept the task the next day.
1. Come to the north of Xingchahai Center and talk to Cleo
2. Then choose [Hide Todd's whereabouts from Cleo] to get the achievement "Fork in the Road Reborn"
If you choose [Tell Cleo the truth about Todd], you can get the achievement "The End of Time"
It'll be nice if the conversation is over