I forgot the name of the oneshot manga but thought the story was cute so I'd like to read it again. Here's the plot:

• Opens up with the boyfriend having different coloured hair and asks girl what she thinks of it. She's pretty indifferent. He's kind of disappointed (cos he thinks she doesn;t care about him).
• There's a misunderstanding when the GF saw him talking to another girl and shouts (in the corridor) that he's her bf...and then they make up?

Something along those lines. Please help!