The Gardener's Luxurious Escort

When I woke up, I had become a baby. It seems I was reincarnated. My new father seems to have it rough in various ways. Actually, I'm struggling too. This time, I need to think of defensive measures so I can live a long life. I tried various ideas I came up with, but none of them worked out. Troubled, I consulted with Grandfather. Huh, there's a good method? It only costs money at the beginning, but after that it's free!? And I won't be lonely anymore!? Then I'll go with that! I jumped at Grandfather's suggestion without thinking deeply... but that didn't work out smoothly either. But still, the "means" I finally obtained. I won't let him go!