The BG chapter of the Sakura Love Hundred Scenes series.
On the eve of Valentine's Day, Kojima Amato suddenly receives a request from his cousin, asking him to take care of a relative who is about to give birth to a child but has unexpectedly encountered a family tragedy. After Tento arrived at the hospital, he discovered that the sister-in-law of the cousin-in-law whom his uncle said was a widow was actually his senior sister Irii Choko whom he dated in high school! Ten years have passed, can Oko, who is about to become a mother, and Tianren, who is in danger, make up for the regrets of ten years ago?
Intention: Don't wait until you lose it to understand the need to cherish it