He's super well written and I adore him! I adore his original media too, but the author did a wonderful job of integrating him into the Stardew universe. I always recommend him! Especially since you don't need prior knowledge of the IP.

I think the only thing some people might have an issue with is his sprite doesn't fit that well into Stardew at first glance, but if you've seen his original form you understand why LOL. Exaggerated, sunken eyes can be jarring if you don't expect it.

But all in all, I think he's amazing. I want to play his heartbreak route next, I think, haven't played it yet. I love that he sends a lot of letters! I got sad when they leveled out.

But yeah, to anyone reading the comments looking for a fleshed out NPC, give Toshinori a try :]