Nitori no Doushitsu Nikki・12 Gatsu

 (似鳥の同室日記・12月 Nitori no Dōshitsu Nikki 12 Gatsu) is the twelfth track of the drama CD Iwatobi High School Swim Club's Activity Log 2. It was released on September 25, 2013.

Translation
Nitori ：“Nitori’s Roommate Diary, December.”

Nitori ：[writing] I want to give Rin-senpai something as a Christmas present. Something to express my gratitude for him always watching out for me.

[Rin walks in, Nitori flings himself over his diary] RIN: Hm? What’s the matter? What are you hiding? Nitori ：N–N–N–Nothing!! RIN: Just show me. [snatches it up] Nitori ：Ah!! RIN: Oh, a diary. You have one too, huh? Nitori ：“Too”…? RIN: Huh? Nitori ：Eh?

Nitori ：[writing] I think I’ll give him a new journal as a Christmas present.