Transmigration System Buddy

In hindsight, Dahlia really should've read the terms and conditions properly... If she had just done that, she wouldn't now have to complete a series of challenges that involved transmigrating to different worlds just so she can eventually get back home. [Don't worry, Host, you have me, Buddy!] Oh, right. Well... at least she has a (seemingly) useful system by her side to help her complete the challenges... How could things go wrong?