In this au tanjiro has been trained by his father tanjuro to use sun breathing.
Tanjiro can use sun breathing 12 forms without any backlash, he does not know the 13th form of sun breathing.
Another thing he looks a lot like yoriichi so muzan Jackson...
Tengen:"he come on move your sluggish body already!"
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Zenitsu:(This is bad but not as bad as rengoku_san's training inosuke got injured so he will take about a month to recover to participate on this training that idiot.)
Tengen:"Zenitsu my boy how are you doing?"
Zenitsu:"I was better till you talked to me."
Hinatsuru:"Tengen_sama here is the training equipment."
Tengen:"Yes put it in the mantion."
Zenitsu:"weren't you were going to retire after that fight?"
Tengen:"Yes but when the demon slayer corps needs me how can I turn my back at it?"
Zenitsu:"Yes."
6 days later
Tengen:"How about we spare for a moment?"
Zenitsu:"Sure."
Both of them take a stance
Tengen:"Let's start."
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Zenitsu:"Too slow."*already behind tengen*
Tengen:"hggghh."(He striked my neck so fast even after getting stronger with my fight with the uppermoon 6 he is a lot faster than before.)
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Tengen:*tries to get up but colapses*
zenitsu:"don't try to get up I struked your neck with a lot of force you might die."
