The Ninety-Year-Old Genius Simulator [Interstellar Arc]

A story about an old woman raising her granddaughter, set against a new backdrop. The premise is similar, but the story is different. Four granddaughters: a mecha engineer, a plant specialist, a beast tamer, and a card master. The main storyline is the same as the one next door. I'll finish the ongoing novel before starting that one, then start this one after finishing it. I'll write the blurb later. Theme: Keep working hard on the writing