REPOST: How to detect multiple players in a box with :GetPartBoundsInBox()

I am trying to make a combat system with punches. I am using GetPartBoundsInBox to act as a hitbox, but i want multiple people to be able to get hit by 1 punch, not just a random person in the box.

example: https://gyazo.com/d45d784b3ef7a4d2c88ebd1360bca8b8 (sorry for lag on this)
i want both people to get hit, not just 1

here is my script:

local char = plr.Character
		local hum = char:FindFirstChild("Humanoid")
		local m1Damage = 3.5
		local swing
		local swingMath = math.random(1,3)
		if swingMath == 1 then
			swing = script.Swings.Swing1:Clone()
		elseif swingMath == 2 then
			swing = script.Swings.Swing2:Clone()
		elseif swingMath == 3 then
			swing = script.Swings.Swing3:Clone()
		end
		swing.Parent = char.HumanoidRootPart
		swing:Play()
		game:GetService("Debris"):AddItem(swing, swing.TimeLength)
		
		local pibSize = Vector3.new(6,6,8)
		local pibCFrame = plr.Character.HumanoidRootPart.CFrame
		
	

		local partsInBox = workspace:GetPartBoundsInBox(pibCFrame, pibSize)
		local part = Instance.new("Part")
		part.Parent = workspace.Fx
		part.Material = Enum.Material.ForceField
		part.BrickColor = BrickColor.new(255,0,0)
		part.Transparency = -0.5
		part.CFrame = pibCFrame
		part.Size = pibSize
		part.Anchored = true
		part.CanCollide = false
		game:GetService("Debris"):AddItem(part, .5)
		
		
		if partsInBox ~= {} then
			for _,v in pairs(partsInBox) do
				if v.Parent:FindFirstChild("Humanoid") and v.Parent ~= plr.Character then
					
					local victimHum = v.Parent:FindFirstChild("Humanoid")
					victimHum:TakeDamage(m1Damage)



					local maxforce2,speed2,KBParent2,KBlifetime2 = 25000,10,v.Parent.HumanoidRootPart,.1

					local kb = Instance.new("BodyVelocity")
					kb.Parent = KBParent2
					kb.MaxForce = Vector3.new(maxforce2, maxforce2, maxforce2)
					kb.Velocity = plr.Character.HumanoidRootPart.CFrame.LookVector * speed2
					game:GetService("Debris"):AddItem(kb, KBlifetime2)
					v.Parent.unstunned.Value = false
					char.Meter.Value = char.Meter.Value + 2
					for i,fx in pairs(game.ReplicatedStorage.HitEffects.Punch:GetChildren()) do
						if fx:IsA("ParticleEmitter") then
							local new = fx:Clone()
							new.Parent = v.Parent.HumanoidRootPart.RootAttachment
							new:Emit(3)

						end
					end

					local maxforce,speed,KBParent,KBlifetime = 25000,10,plr.Character.HumanoidRootPart,.1

					local kb = Instance.new("BodyVelocity")
					kb.Parent = KBParent
					kb.MaxForce = Vector3.new(maxforce, maxforce, maxforce)
					kb.Velocity = plr.Character.HumanoidRootPart.CFrame.LookVector * speed
					game:GetService("Debris"):AddItem(kb, KBlifetime)

					local hitMath = math.random(1,4)

					if hitMath == 1 then
						victimHum:LoadAnimation(script.hitAnims.Hit1):Play()
					elseif hitMath == 2 then
						victimHum:LoadAnimation(script.hitAnims.Hit2):Play()
					elseif hitMath == 3 then
						victimHum:LoadAnimation(script.hitAnims.Hit3):Play()
					elseif hitMath == 4 then
						victimHum:LoadAnimation(script.hitAnims.Hit4):Play()
					end
					local soundMath = math.random(1,2)
					if soundMath == 1 then
						local hitsound = Instance.new("Sound", v.Parent.HumanoidRootPart)
						hitsound.SoundId = "rbxassetid://9066673412"
						hitsound:Play()
						wait(.584)
						hitsound:Destroy()
					elseif soundMath == 2 then
						local hitsound = Instance.new("Sound", v.Parent.HumanoidRootPart)
						hitsound.SoundId = "rbxassetid://5501600429"
						hitsound:Play()
						wait(.584)
						hitsound:Destroy()
					end

					wait(.5)
					v.Parent.unstunned.Value = true

					return
					
					
				end
			end
		end

please help i cant figure this out