 If you liked
Gestalt
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 ...then you might like
Ame Tokidoki Koi Moyou
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There's a oneshot in Gestalt called "See-Through", it can be found separately by googling it. Now that's outta the way, both of these oneshots give off the same feeling and atmosphere, their setup is similar as well, based on a rainy day. The difference being one is shoujo and the other is BL. So don't read if one isn't your preference.