Xiehou Ta de Shaonu Shidai

Both the main character has an opportunity to transforms back into their youthful self and has to complete college/highschool in order to redo their past regrets.  

『Jiisan Baasan』& 『Mom, I'm Sorry!』are both heartfelt shows that's about the joy of becoming young again much to the surprise of their other family member(s) . Circumstances of certain characters are similar in both shows where the mother had a terminally ill condition which is cured again due to becoming young again. It also explores the conceptions of getting another chance at a life that was missed out due to the nature of their pasts and the circumstances surrounding their long forgotten /lost dreams. With their new-found youth they get that time to do things they couldn't do in their past. Jiisan Baasan has a more 4-koma style episodic approach as opposed to Mom, I'm Sorry's storyline which presents an overarching storyline. read more 

Both of these heartfelt stories are about a strong willed mother who has been given another chance at a life that was cut short and become young again much to the surprise to their family members. (Though 'reincarnation' is the main driving force for TsumaSho, whereas 「Mom I'm Sorry ！」is more supernatural.) The main crux of both shows is about the appreciation of the time spent with the family and how letting go becomes the challenge for each family. They also share some similarities with topics and themes such has single parent challenges, second-hand happiness, domestic abuse and self-martyring/altruism.