Hola, acabo de verte escribir fic de DxD. Aquí está mi consejo: nunca escribas una historia de DxD usando el anime de DxD como referencia, porque a diferencia de las novelas ligeras, la versión anime de DxD arruina muchos personajes, especialmente los personajes de Issei hasta el punto de reducirlo a una máquina de fanservice.
También sobre "Soy Feliz" Issei ni siquiera tiene tiempo para dormir, y mucho menos para ir tras mujeres, se ahoga en su trabajo, de hecho es bastante similar a Naruto que descuidó a su esposa Hinata, Boruto y Himawari, esto es lo que le pasó a Issei en el futuro.
Issei Hyoudou Gremory: The future version of Issei who is now married to all of the girls who love him, and therefore achieved his dream to be a Harem King. Issei hardly has time for his children due to his busy schedule which is filled for the next 200 years, with his wives taking turns to see him and act as his escort. He's always rushing over back and forth from one place to another, such as to certain locations for other mythological systems, whether it's helping out, giving speeches or some kind of industrial enterprise. He is noted to still be a pervert even then. Issei can now take the form of a huge dragon that is about a hundred meters in size with crimson scales. At the last moment, Issei traveled back in time with Ernestine to assist his children and settle the battle.
Puedes leer inglés ¿verdad?