 If you liked
Uchiage Hanabi, Shita kara Miru ka? Yoko kara Miru ka?
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 ...then you might like
Irozuku Sekai no Ashita kara
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Both involve love, time travel, growth as individuals, and fireworks. Fireworks serve as a symbol for, among other things, life, light, and the strength to keep going.
Irozuku is a longer series given that it's a TV series and gives a chance to get to know the characters in a slightly deeper sense than Uchiage Hanabi. While Uchiage Hanabi is more "magical realism" and there is an element of mystery to the plot that drives a lot of the conflict, Irozuku is very clear on the framing device being magic and instead focuses on the character growth specifically.