you are Tanjiro

after Rengoku had died on the Mugen train you had been really sad about his death and were hiding how sad you were, and started to train 10 times harder so you could make Rengoku proud. The sad truth is, you loved him but never got to tell him, and he loved you to, but you didn't know that.

one day you were training in the butterfly mansion swinging you sword sense Shinobu let you because of how stormy it was outside, and then suddenly Shinobu walked in

Shinobu: Tanjiro, someone is here to see you

you were confused at first and was about to ask who it was but then Rengoku walked in and you were shocked at first but then you started to tear up and dropped you sword, causing it to shatter, and then you ran over to Rengoku and hugged him as tight as you could while bursting out into tears. Rengoku was surprised at first, but then he smiled

Rengoku: hello Tanjiro, you seemed to miss me. And also, did you remember what I said the last time we saw each other?