Crazy host loves sickly

System cutie 417 chose a cute host for the first mission, but who knew that this host was a lunatic. He was a useless little loser at first, but later he became proficient in witchcraft, finance, gambling, alchemy... everything! "Host, you are illegally using a cheat!" "No, this is what my partner taught me!" He would also force a big guy into a corner and say "I will love you forever, but if you dare to betray me, let's die together!" "Xixi loves you, I couldn't ask for more." The heroine is crazy! The hero is a real yandere! Two-way rush, two-way confinement! Sweet + refreshing, 1V1, the heroine is a growth type! ...