Tidak lama lagi ulang tahun Zen. Tapi, ingatan betapa sedihnya kehilangan ibu masih membekas dalam diri Zen. Seperti apa ‘resep sup ibu yang sesungguhnya’ yang akan dibuatkan untuk Zen?
This volume is more about their growth at home and in school. It's a really simple story as per the previous three volumes, so if you look for something deep or fascinating probably you cannot find it in these books. This series is pure heartwarming story of two childhood friends growing up and their interactions. Personally I found it enjoyable still, just like the past three books.