Fuyuki Hoshikawa

星川冬樹 星川 冬樹（ほしかわ ふゆき）

The name appeared in Volume 7. One of Mafuyu's younger brothers. His face closely resembles Mafuyu's. He has a good relationship with his sister and often helps her with household chores. On the other hand, he is reserved and quiet, does not have any particular hobbies, and when asked by Mafuyu what he wanted for his birthday, he modestly replied, "Nothing in particular." However, he likes animals and often watches TV programs featuring animals, secretly wishing for a set of animal encyclopedias. He refrained from asking because of the high cost, but Mafuyu, having heard about it from Itou who noticed Fuyuki's interest, gifted him the set of animal encyclopedias.