It''s been three weeks since Arthur arrived at the Underworld, just like he planned, Arthur train Issei''s body


    Together with Tannin they train Issei


    On Issie''s first day, Arthur increase the gravity around him by at least two then let him run around the mountain until he was exhausted, Arthur plan to push his body to the limit


    Ever time Issei adapt to the gravity surrounding him, Arthur always increase it by 1x sometimes 2x, Issei always calls him a demon every time Arthur do that


    This continued for the past three weeks


    Tannin also helps Issei to properly utilize the power of his balance breaker, Tannin help him by becoming Issei;s sparring partner


    Issei always got his butt wipe out


    Arthur also occasionally sparred with Issei,


    In his first week in underworld


    Arthur always having s.e.x with Venelana and Grafia at night at his room, the three of them sometimes teleport to the human world and have a foursome with Anne


    Anne already gotten the news that her husband already got the woman that he wants in his first night at the underworld


    The four of them always have a foursome since then


    The following day Arthur resumes training Issei, which continues until the third week


    Arthur also explained to Grafia about him not from this world and taking her with him when he returns


    Grafia is also shock about it, but just like Venelana she slowly accepted it


    Arthur also create a perfect clone just like Grafia as her substitute


    Grafia used her clone as a replacement of her every time she went at Arthur''s room and have s.e.x with him


    She enjoyed having s.e.x with Arthur


    "Boooost"


    Currently Arthur is having a spar with Issei


    Bang!


    Bang!


    Bang!


    The two of them are exchanging blows to blows


    Arthur doesn''t want to immediately finish the fight, Issei won''t learn nothing if he does that, he needs experience


    Tannin is watching them from the side


    "Explosion"


    "Great"


    Issei said hearing his Boosted Gear


    "Get ready Arthur, I''m going to win this time"


    Grinningly said by Issei


    "Dragon"


    Wosh!


    Issei shouted then a giant red ball of energy form in front of him, this is bigger than he usually create


    "Shot"


    Bam!


    Swish!


    Issei punch his attack at Arthur''s direction


    "Hehe, your need stronger attack in you want to defeat me"


    Arthur said to Issei


    Arthur then creates a curve short sword with the blue eastern dragon emblem into its hilt and five holes along the middle of the shard blade, and 5 half moon holes along the other side of the table, the blade is split into two different colors, the sharp part is silver and the opposite is a dark green moss


    Lostvayne


    The sacred treasure that Meliodas use


    Arthur also created it, he also practiced Meliodas magic


    "Full Counter"


    Arthur swung the sword in horizontal manner


    Ping!


    "What th.."


    Booom!


    Issei can''t even finish what his saying before he eat his own attack


    Bam!


    Issei slam hardly at the giant rock


    "Arggg"


    Iseei groans as he tried to stand up but failed,


    Crack!


    Crack!


    His balance breaker also starts to fall apart


    "Are you okay, partner"


    Draig asks Issei


    "Yeah, I''m okay"


    Bang!


    A gun sound suddenly heard then Issei felt his body getting healed


    "You okay, Issei?"


    Arthur came to him holding a Silver gun


    "Yeah, thanks for healing me again"


    Arthur always heals Issei after they finish training him


    "Time to go back then"