Yasahrio collected the humanity from the corpse near the bonfire and used it to reverse hollow. He wanted to see if the Crestfallen Warrior had any new dialogue but he was low on time so he returned to Konoha using the bonfire. He then put the stuff he took like the rope and the hook back to where he took it from. And his father didn't suspect a thing upon returning.
The next day Yasahrio asked his father to make a crossbow for him. His father didn't knew why Yasahrio was interested in a civilian weapon instead of ninja weapons like usual but he didn't question his son's changing preferences.
Crossbow is a common weapon used by non-ninja hunters for hunting small game like rabbit. The reason they are not used by ninjas is primarily because of their lack of power. And this will remain the case until some advancement in crossbow tech happens.
Yasahrio's father gave Yasahrio the crossbow which was in the storage. It was a wooden crossbow with a very primitive trigger mechanism. The draw length of that thing was only 7 inches and the draw weight was about 40 kg. This thing was much worse then the bow he got from choosing the hunter class.
"Do you not have any composite crossbow?"
"What is a composite crossbow?"
"Its when the limbs of the crossbow are made of two different material usually a harder and a softer one."
"Why will anyone make the limbs like that?"
"It increases the power of the weapon without increasing the size. Ideally for a mounted archers."
"How do you know that?"
"I ahh... yes, I accidently discovered it when playing with different kind of wood. After that it was all the work of imagination."
Yasahrio's father didn't completely believe Yasahrio about that but he was interested in experimenting to test his son's theory.
A week later Yasahrio's father successfully managed to make a compound bow and a compound crossbow. Yasahrio also gave him new designs for the crossbow which works much better.
Yasahrio's crossbow had a massive draw length of 28 inches and a draw weight of 260 kg. It seemed impossible for someone Yasahrio's age to be able to use it but thanks to his 12 strength stat his strength was now more then any adult non-ninja. Combine that with a high kick stand and infinite stamina and Yasahrio can use that thing with now problems.
The damage done by this crossbow is much higher then any early game weapons and its like a gun so its easier to air. It uses heavier and longer bolts for maximum damage so the ammunition needs to be crafted every time the bolt breaks. The reload time is worse then the sniper crossbow but does it really matter if you can shoot from 50 meters away accurately?
Yasahrio's father was surprised by Yasahrio's new found strength but concluded that it must be because of the chakra increase during puberty. Yasahrio was diagnosed with the inability to mold chakra at an early age and that's why he was not send to the academy. But now with this new found strength it might be possible to graduate.
Anyways, Yasahrio returns to Firelink shrine a few days later all stocked up on arrows. He first tried his armor piercing arrow heads on the hollows and then the broad heads and then the blunt arrow heads. From this he learned that blunt arrow heads were the ideal arrow heads.
The enemies usually are close enough for Yasahrio to be able to target their gaps in armor so armor piercing arrows are unnecessary against hollows.
The broad heads do a lot of damage but they often go though the target and then are lost.
The blunt arrow heads are perfect since they do get lost or break often. They also have the capacity to one shot most hollows as long as its a headshot.
Yasahrio used blunt arrows from then on to successfully kill every enemy between him and the next bonfire. After that he farmed souls for the rest of the day.
The next day Yasahrio made a plan to defeat the Taurus Demon using firebombs. The concept was simple and when he tested it the tests showed it was possible.
Now with a seemingly solid plan Yasahrio entered to boss room and killed the archers first. Then he placed all the firebombs in barrels and placed the barrel at the spot where the boss lands when tries it tries to climb the tower. From below the barrels are not visible so now only one last thing was left to do.
Yasahrio walked closer to the other side of the boss room and ran back at full speed when the boss was Aggroed. The boss was faster then expected and would have caught Yasahrio if it didn't waste time roaring. Yasahrio managed to reach the top of the tower unharmed and after that the only thing left to do was to wait and watch.
The boss jumped at the same spot as in the game which was also where the firebombs were. When the boss's weight broke the firebombs and they exploded. The collection of 60 firebombs exploded with so much power that it knocked Yasahrio who was standing at the center of the tower back multiple meters only being stopped by the stone wall from falling to death.
Yasahrio was badly injured from the explosion but survived thanks to the Estus Flask. As for the demon, it's body vaporized from the explosion and only parts of its bones remained. Yasahrio took the horn of the demon which dropped from the sky and put it in the inventory. The usual boss drops were automatically transferred to his inventory.