This is a niche but fascinating topic! For those unfamiliar: Natsuiro High School: Seishun Hakusho (夏色ハイスクル★青春白書) is a 2015 open-world school-life simulator for PS3, PS4, and PS Vita, developed by Tamsoft and published by D3 Publisher. It’s often described as a "summer vacation dating sim" with light RPG elements — you befriend classmates, join clubs, fish, take photos, and explore a semi-open Japanese town. The "Seishun Hakusho" subtitle means "Youth White Paper" (a Japanese coming-of-age document), fitting its nostalgic, slice-of-life tone.