You married someone named Alex and had a daughter from Saikou, but the family life you dreamed of ended up being destroyed because Alex cheated on you and instead took over Saikou's custody

If you hadn't met Alex, you wouldn't be like this. However, if there was no Alex, you wouldn't be able to meet Saikou, your little daughter who you love so much

It turns out that besides that, your classmate, Sae, comes and tells you about an experiment he did about a time machine. You are also determined to try the time machine with Sae to long before you met Alex

You and Sae went through space and time in that time machine and this is where you two ended up on campus where you were already dating Alex at that time

"Are you sure you want to change everything?"

Tanya Sae looks at you with an expressionless gaze