absentminded.
ab·sent·mind·ed /ˌabsəntˈmīndəd/ adjective: absent-minded; adjective: absentminded (of a person or a person's behavior or manner) having or showing a habitually forgetful or inattentive disposition. "an absentminded smile" some things are better forgotten. (all rights to tokyo revengers go to ken wakui!!) f/n is like...