Chiyo is petite with short hair tied into small twintails, along with glasses.
Chiyo is reliable and tidy which led to her becoming class president. But, she secretly dislikes the high expectations other place on her.
When she takes her glasses off, she becomes anxious and begins crying uncontrollably.
- Iin (伊院) is made of 伊 (Italy, but may also refer to 伊呂波, meaning "fundamentals") and 院 (institution, or school).
- Chiyo (知与) is made of 知 (wisdom) and 与 (to participate, or award).
- She is the second girlfriend introduced who is related to someone else within Rentarou's family. The first would be Hahari.
|Story||Timeline • Characters • Chapters and Volumes|
|Main Characters||Aijou Rentarou • Hanazono Hakari • Inda Karane • Yoshimoto Shizuka • Eiai Nano • Yakuzen Kusuri • Hanazono Hahari • Haraga Kurumi • Meido Mei • Sutou Iku • Utsukushisugi Mimimi • Kakure Meme • Iin Chiyo • Yamato Nadeshiko • Yasashiki Yamame • Momi Momiji|
|#1 to #5||Hanazono Hakari • Inda Karane • Yoshimoto Shizuka • Eiai Nano • Yakuzen Kusuri|
|#6 to #10||Hanazono Hahari • Haraga Kurumi • Meido Mei • Sutou Iku • Utsukushisugi Mimimi|
|#11 to # 15||Kakure Meme • Iin Chiyo • Yamato Nadeshiko • Yasashiki Yamame • Momi Momiji|
|Other||Aijou Rentarou • Asakawa • Love God|