Totally the fault of Tumblr user bleeding-shortcake.
For Their Own Good
"I can't believe I let you talk me into this," mutters Nitori.
"Eh? Why? It's for their own good - you even said so!" Nagisa holds up his prize with a grin. "Besides, I already got Rin-chan's key."
Nitori stares at the object for a minute before he starts spluttering. "How -"
"I got it when I hugged him earlier," says Nagisa. "Come on, let's hurry. We don't want to get caught!"
Bending, he unlocks Rin's desk, and opens it with a flourish. "Now, look for anything about Haru-chan, and then we'll start thinking about how to get them together..."