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Yuuya Kamigasaki is a normal, 17-year-old high school student. But suddenly, a princess who calls herself Angelia Eight Gransia appears before him from another world.
When "Nice Guy" Asai Manatsu's marriage proposal gets rejected, he thinks his day can't get any worse, until a Knight in Skull helmet tries to kill him! He's saved by a beautiful, silver-haired swords-woman and told to flee, but his nice guy impulses are too strong and he saves her from an attack, getting himself killed in the process. As he dies he wishes to be reborn in a world where people won't judge him for taking care of others...
New Trinity Seven spin-off based on Anastasia=L. Meanwhile Arata AND the rest of Trinity Seven girls are training to go to Dante's Gate, Anastasia goes to Biblia Academy to investigate a strange event that is related to "The Demise".