Work Text:
Mona had always admired her sister. As she grew up, this admiration slowly turned into envy and then into a pretty big complex. Everyone loved Sena: she was cute, modest, she managed to have a wonderful job, but also close friends and a boyfriend she adored.
Next to her, Mona was often lonely, whether at work or at school.
However, when she felt down, she knew she could always count on Hiyori and her optimism. She made her so happy Mona promised herself that she would do everything she could to share some of the happiness she made her feel.