Twenty years later, Tsuna was killed by his enemies because of his kindness to them.
When he opened Sora's eyes again, Tsunayoshi found that he had gone back to the past.
Being kind to the enemy harms oneself and makes the guardians miserable
This time, Tsunayoshi will no longer be kind to the enemy. Kindness to the enemy is cruelty to himself. The moment he closes his eyes, Tsunayoshi is no longer the kind and compassionate Oku.
The kindness of the sky is only given to the weathers he protects!