In Another World? With Only My Smartphone!?

"Haa, I'm super ill! On the outside, I might look crazy healthy, but the truth is I'm a late teenager with a heart of glass! Filled with the desire to give up on school! That's me, Riamu-chan!! If I travel to another world, it'd be my chance to do that!? Right!?"

I'll think of a better synopsis later. Basically, a half-cupid/half-succubus neurotic girl gets sent to another world with her phone.