After Contracting a Succubus, I Became the Strongest Summoner

[Multiple heroines, no system, summoner, city, monster fighting and upgrading] During the summoning ceremony, genius boy Lin An unexpectedly failed and summoned slime. However, the truth is that he signed a contract with the succubus who escaped illegally. "Don't look, your original summoned beast was squeezed out by me... Now, I am your contractor." What does it mean that you are being chased by someone whose strength is three levels higher than the highest human combat power? {} What does it mean to kiss someone to mend a demon... This is not bad. What is a slime thrower, and why do opponents need to wear helmets when playing games? I contracted the succubus sister first and then the vampire loli. Why are my contracted beasts so unreliable?