I need help findin two story's I forgot what they were called but I really liked them.

story 1

its been a year since the fire and it's coming up to the annerversy and to celebrate it SFIT is holding like a showcase and one of the inventions is a time machine and it transports hiro back to when tadashi is alive and hiro stops tadashi for going into the building it still follows the same plot. It with tadashi involved and in the end baymax and hiro go into the portal but come out a year later in that time where hiro died. If it helps even more tadashi is abit worried in the car chase scene because hiro is driving instead of gogo

Story 2

Tadashi dosent die however hiro receives a head injury I can't remember much about this book but If I remember correctly tadashi and hiros parents were killed in a car crash and at the funeral some guy came and tadashi killed him to protect hiro, which is why tadashi is so protective of hiro and honeylemon trys to help by making hiro talk about it but instead triggers an old problem of his where he stops talking which make tadashi very angry with honey lemon and then they finally figure out who the villian is (can't remember how to spell his name) he uses tadashi protectiveness of hiro against him and make tadashi belief that honeylemon has hurt hiro which results with tadashi taking out baymaxes healthcare chip and orders baymax to destroy honeylemom, I don't really remember what happened after that

But if you know the names to any of these story's please let me know