The instant messenger has developed as an important communication media platform. However, because of the nature of instant communication, instant messenger services place many limitations on communicating with nuance. We believe that the easy nature of digital communications tends to weaken serious aspects of personal communication such as patience and commitment. On the basis of critical perspectives, we designed the digital messenger 'Digital Love Letter' (DLL)': a mobile messenger in which the expressive process of interaction is more important than the final output. The main concept of DLL is to share the process of communication using a noninstantaneous and non-multitasking interface, so that users can share their time with some similar nuances to face-to-face communication. Both writing and reading messages require concentrated attention. Thus, this paper suggests a new system of digital messenger, that is also a new method of computermediated communication (CMC).