Y/N is the younger brother of Leo and younger twin to Hyoki, when Y/N is young Leo was the center of attention that leaves Y/N and Hyoki in the shadows until one day when Y/N is walking home he bumps into Minami and saw that Y/N looking sad, so he gave him the card Blaster Blade and Y/N was introduced to Cardfight!! Vanguard, when Y/N is building his deck, he got a card pack that contains Blaster Dark, so he decides to give it to Hyoki as a gift, before Hyoki left Y/N put a letter that she found and said that he loves her as a brother and a Blaster Dark card in it on her table that caught her interest and then she left and build her deck if she wants to see Y/N again, When Y/N finished building his deck he starts card fighting at a card shop that he made friends with, which made Leo very confused on why Y/N behavior is a bit off and coming home late so she decides to investigate why then she go to the card shop that Y/N goes to and found out that he is playing Vanguard then it caught her interest then she open a card pack and found a card that resembles her secret animal but in human form Incandescent Lion, Blond Ezel then she build her deck and then she made a better relationship with her brother but then Y/N starting obtaining PYSqualia in the process, When Y/N is at the Foundation Star Cross Academy he made a cardfight club that other students can play Vanguard and Leo accepts the club to the school, but Y/N is not the only person to have PSYqualia including his sisters and then their story begins. I don't own Senran Kagura and Cardfight Vanguard.