Presumably Japanese book about 2 or 3 main characters connected when they were kids and impact of those connections on their lives as adults

[Aysel]

I started reading this book in 2018/2019 on my computer, and then it got deleted. I would be so grateful if you help me!!

[Mateusz]

Very little details but perhaps:

Colorless Tsukuru Tazaki and His Years of Pilgrimage

If not it is still pretty good book you should read it.