DSE-1109 - Living with my new stepmom after dad passed away

Let me put it simply: it's the worst. I thought the opening would feature Izumi Manaka (Makoto Kuroiwa), but instead, it's just 50 minutes of some unrecognizable, unattractive woman with a gray-haired old man. The last 40 minutes feature Izumi Manaka, but the acting is stiff and cringey, and the 'son' character is played by a middle-aged man—a completely baffling choice. I only rented it, but if I had bought it, I would've thrown it straight in the trash.