Ending With Onii-chan
Anonymous
Big brother always loved his anime girls, you knew that. You watched him play eroge since before /=either=/ of you should have known what an 'eroge' was. You watched him obsessively watching anime and lusting after the girls. Big titties, little tittles, perfectly average titties- you saw big brother drooling over boobs for all of your life. It's why you decided to take a job in game development.
You're not the 'innocent little sister' that big brother likes to think you are. The things you've typed into the code of these games could make even the most horny of men blush. And you know you've made many of them blush- your reviews say so.
But this isn't about those men; none of what you did was for them. It was all for onii-chan. Speaking of whom...
Big brother lays on the sofa next to you, VR headset secured on his head. He's obviously lusting after the girls you've created, but he's only just started the game. The best girl, the route you /=know=/ he's going to choose, hasn't appeared yet. And that's because you're still here, typing away into your laptop to make sure everything is perfect. Once you put on the headset, you'll be in the game with him, too.