 If you liked
Given
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 ...then you might like
Tasogare Out Focus
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Both of these anime are BL about young men falling in love, though Twilight Out of Focus is a little bolder at times with how much is actually shown on screen. Both are also centered on characters who meet via their interest in art - TOOF being film and Given being music. Both also start off with two characters meeting in school and building on the story from there. Given felt more mature given (lol) that some of the characters are actually adults.