After transmigrating into the noble Tepes family as its son, he thought he would enjoy the comfortable life of a young aristocrat as the heir to a vampire clan in this world.
He never expected his good fortune to come to an abrupt end. Overnight, the family was wiped out by a coalition of clergy who had been plotting for a long time. The already declining family was destroyed, and Cain became its last surviving member.
With no choice, he began a life on the run with his adorable little maid. Then, by chance, he was taken in and brought home by a young lady overflowing with "dignity."
"How dare a mere Cain talk to me like that? The blood content in today's black tea must be doubled!" The dignified young lady grinned mischievously, as if she had thought of something amusing.
"You're just a little kid yourself! You'd better get ready to duck and cover, you mere Remilia!!"
Cain took the black tea Sakuya handed him and added fresh blood to it, all the while wondering how he could repay the young lady for her kindness.
Contains some fan-created content (I may have forgotten some of the original settings and will fill them in later).
To be decided: Chivalry of a Failed Knight / Gensokyo (I) / The Present Day (Tokyo Ravens) / Gensokyo (II) / The Present Day (Hellsing) / Overlord / Campione! x The Vexations of a Shut-In Vampire Princess /