Yn is a powerful warrior who can use ki he was trained throughout his life he fought people throughout the world like sirzechs,azazel,saraiorg,
Lord Micheal he was so strong he was called the supernatural strongestYn meet kuroka and start to hit it off talking to each other, having fun,exploring places till it lead to both of them in a relationship
But it didn't last when Yn was visiting her Yn heard moaning so what he saw got him very angry Yn saw kuroka having sex with issie Yn shot a ki blast destroying the door Making kuroka and issie scared that Yn saw them
Yn:so your cheating on me behind my back
Kuroka:Yn please let me explain
Yn:there's no need for you to explain you cheated on me because of your heat cycle so why didn't you tell me or help you with your heat cycle I was with you and you didn't say or do anything
Kuroka:...
Yn:cat got your tongue
Issie summons his sacred gear and punch Yn only for it to have no affect
Yn then one inch punch issie Making him lay on the ground Yn puts his left foot on issie chest
Yn looks at kuroka
Yn:this is the guy you had sex with a man who can't handle a single punch I'm disappointed In you kuroka
Yn transformed into tuffel form three
Yn:I'm the strongest warrior who has ever lived if this red dragon emperor can't handle one punch then what's the point of being a dragon and a emperor You made the wrong choice kuroka goodbye and never come near me again
After that Yn trained to get rid of that anger just destroying punching bags till Yn was invited by the devils for a party after arriving to the party Yn saw the red dragon emperor holding hands with rias gremory then Yn got an idea to expose him
Sirzechs was making a speech saying issie and rias are getting married and asked if someone to say some words to the couple
Yn:I will sirzechs I got something to say to both of them
Yn arrived at see everyone looking at him
Yn:hi y'all might know me as Yn the supernatural strongest and I I'm surprised rias is marrying the red dragon emperor me and rias know each other for years she's smart,beautiful,a good leader in her peerage but I have some news that rias will get made about
Rias:what are talking about Yn
Yn looks at issie and smirks
Yn:rias do you know why my relationship with kuroka ended
Rias:yeah some bastards had sex with her
Yn:very good but that bastard is in this room
Everyone starts looking at each other
Rias:well who is it
Yn:your holding his hand rias
Rias looks at issie as he sweats
Rias:it was you...you slept with kuroka behind Yn back
Everyone was glaring at him
Issie:okay I did it but she was in her heat cycle and Yn wasn't there
Yn:she could've told it was her heat cycle and I would've satisfied her
Rias let's go of issie hand and pull of the engagement ring from her finger
Rias:this marriage is over
Issie transformed to his balance breaker and charged at Yn only for Yn to block and sent him flying
Yn and issie arrived at a battle field
Yn:you pay for betraying rias and ruining my ex relationship
Yn transformed to tuffel form 4
Yn:I'm going to enjoy breaking physically and mentally
After the fight issie surrender and was highly punished after cheating on rias
Epilogue
Yn haven't seen kuroka for a while wonder if she disappeared Yn asked koneko where her sister went she didn't know either she wasn't died just disappears like she didn't want to be found any way Yn and rias became more then friends and became a couple after a few months Yn proposed to rias and she said yes the wedding was beautiful specially Rias in a wedding dress all of us had a nice time then after a year me and rias became parents to two beautiful children one boy named s/n and one daughter named d/n(Author:okay the high school dxd is finally done now I'll be doing cheating popular girls next so be ready for those five chapters)
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