Detective Conan: Birth of the Demon Child

A third-rate painter in his past life, a tycoon's son in this one. I thought it was a rebirth story, but it turns out to be a system story. I want to rely on myself, but you make me drive a waigua (a type of online gambling platform).
"Ding! Congratulations on successfully signing in to Ran Mouri. You are rewarded with a Master-level 'Karate' manual, which you can claim at any time."
"Ding! Congratulations on successfully signing in to Gin. You are rewarded with a [Servant Contract], which you can claim at any time."
"Ding! Congratulations on successfully checking in with Ayako Suzuki! You are rewarded with a copy of 'Money Power,' which you can claim at any time."