Seraph of the End Begins

What should I do if Yi Mie traveled to the world of Seraph of the End and became the protagonist's brother? When there was no other way to escape, the system was awakened! "System lottery!" "Thank you for your patronage" "..." "MMP!" Introduction scribbling Multiple heroines, a harem, not too much, not too much, not too much! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.