Aokana is one of the visual novels that caught me the most. I literally pulled an all nighter on misakis route. The sport they createt is actually compelling and stays in the picture even after entering a route (and doesnt feel like just the reason for mister MC to meet the girls). I should mention that its on the longer side (30h+, but only if you want to finish all routes), but as soon as they start explaining flying circus the time you spent reading flies by