Is it possible to cheat in the game "Dream Girlfriend" ?

[Warutsu]

Name of Game: Dream Girlfriend
Play Store Link (If it's a paid app, the apk): https://play.google.com/store/apps/details?id=jp.ne.ambition.googleplay_nizikano2d_glb&hl=de
Version: 
What cheat? Health, xp, gold...: NP and Shells
Have you tried cheating this game? What happened?: I'm new to this and tried searching the Shell value but I find waaaaay too much results to sort it out, and I cant search like this for NP, because you dont get it without spending money.
Comments: I guess its online? You can visit other girls and chat with other players.

[TruckyCLM]

Shells?

Ye going duck hunting and the gals lookin fly?

Ahaha sign me up!