| Raison D'etre ① | |
|---|---|
| Kana | レゾン･デートル① |
| Romaji | Rēzon Dētoru ① |
| English | Reason for Existence ① |
| Chapter Information | |
| Volume Number | - |
| Chapter Number | 11 |
| Route | Yumiko's Route |
| Chapter Guide | |
| Previous ← Lightning |
Next Raison D'etre ② → |
Raison D'etre ① (レゾン･デートル①, Rēzon Dētoru ①) is the eleventh chapter of Grisaia no Kajitsu: L'Oiseau bleu (Manga).