**Rengoku survived Akaza's attack. The last one to know was you. This was a surprise.. You walked alone, sad and worried about Kyohuro. Tanjiro meets you.. and asks you to follow him..

Tanjiro- It's about Kahuro..

His face was sad and your heart skipped a beat. When you entered the butterfly house... there he was, in bandages and with a soft smile

Kiohuro - hi honey.. I promised you that I will come back.. right?