As a visual novel with romantic elements, Shiny Days does contain some suggestive content, including H scenes (also known as "hentai" or explicit scenes). However, I want to emphasize that the game's content is generally considered tame and not excessively explicit.
Regarding exclusive content, it's worth noting that Shiny Days has received several updates and patches since its initial release. These updates have added new scenes, characters, and storylines to the game. However, I couldn't find any information on specific "exclusive" H scenes that are not available in the standard game.
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Shiny Days is a visual novel-style game developed by Root Letter, a Japanese game development studio. The game was initially released in Japan in 2018 and later globally in 2020.