AN: A little fast, I watched a Might Guy amv and this idea popped in my minds.

During his final battle with Madara, he wasn't saved by Naruto in time and his soul went to pure land. There he met his father Might Duy and they had a happy but awkward reunion (your choice).

When he finished talking to his father, he is greeted by sage of six paths who offers him a chance for reincarnation due to his pure soul and dedication towards helping others even if costs him his life. Guy politely refuses him and says that he wants to spend the eternity with his family members. Sage complies with his request and was ready to leave but is stopped by Duy, who requests that he want to speak in private. During their talk Duy requests sage to forcefully make Guy enter the cycle of reincarnation as it's a rare opportunity and it's will not be right for him to keep Guy here, because he deserves a second chance. Sage accepts his request and enters Guy in cycle of reincarnation. But during that Guy resists and his soul transvers in High School DxD soul cycle of reincarnation.

Guy is born in an ordinary household in Japan. He doesn't have access to chakra but he can feel something else inside his body (magic). He trains regularly despite told by his parents that military will handle any invasion by China and he wouldn't make a difference. He knows that they are worried about his wellbeing, but a person who has trained his whole life in previous world, how can he let his bad habit of hard work stop.

He is now 17 and is attending kuoh academy which he got in through sheer luck (he is not good in his academics, but his sports trophies are immense).

During his stay he makes friends with kendo club (I am making kendo his hobby) and plans to make his own club of fighting and training (basically gym) in later date. He saves kendo club from perverted trio many times and even becomes friends with Issei (who doesn't mind him because he doesn't look good).

Guy is still having trouble with opening his gates, because he is unable to open the gates with that power (magic) he was somehow able to use in small amount. The gates are way too tightly sealed for him to open them, but he doesn't loose hope and tries every now and them.

(Fast forward to when raynare kills issei)

Duy is doing his daily workout in that same park, when he feels heaviness in air. He goes to check it out where he sees Issei die. Unable to contain himself he charges towards Raynare to ask why she killed issei (Naruto thingy -_-). Instead of answering Raynare makes fun of him and proceeds to kill him. Might guy is surprised to see use of some weird power and dodges most of the light spears. But one of them manages to implant his heart and he was barely able to hold his life. Raynare left after confirming that her primary target is killed.

Rias arrives at the location and revives Issei (cannon) and feels pity for Guy who gets caught in crossfire (she doesn't even remember that he studies in same school). She calls Sona for her help. Sona arrives and says she can't help her, but suddenly remembers that she has one pawn left (Ruruko Nimura is out). She says that Rias owns her one for this and proceeds to resurrect Guy. (Naruto version of Guy is way strong than this version of Guy, this version of Guy is just at the level of Youth Olympics participants). The pawn piece doesn't show any resistance and is absorbed by Guy's body, but Sona and Rias missed one small detail, when piece enters Guy's body it starts dividing into 8 parts, with 8th being the biggest and 1st being the smallest (divided how tailed beasts were divided by sage) and settles on each gate.

(From here it's yours)

AN: Might Guy is the most underappreciated person in Naruto.