Hikaru no Go (2020)

Bromance/soulmates, in both series there are two MLs, who care and support each other, while also stimulating each other's growth and aspire each other, both cover long period, 1 year in RLASS and 10+ in Hikaru, MLs personal growth - physical and psychological.

It's korean drama but It has similar story and the Go prodigy too
they are very similar in friendship relationships and Go players how their life isn't that easy and they triumph in their game that they love