Thanks for your feedback once more!
You're right: the side image of the protagonist shouldn't be there when he's grown up. I changed that for the next update.
Regarding the story's pacing: I'm sure that can be improved, but there's also the issue of different players: I had people saying my first VN was too slow while others said it were too fast. There are definitely different tastes there. – Same as with the length. I'm working on the pacing of my stories nevertheless.
There's no big stakes in Dere Quartet, as it is a rather cozy story meant to give some relaxed time. It's different in The Last Secret and it will be different in Kieta Memory.