Mondoumuyou

Summary from Korean-Manhwa:

Hitaka Touko catches a thief in her room. It turns out to be Hayashida Ichisaie, a classmate. Through a series of unexpected moments, she finds herself caught up in the act of burglarizing along with Ichisaie.

Title: Mondoumuyou
Creator: Ukyou Ayane
Status: Complete
Genre: Adventure, Shoujo, Romance