<![CDATA[Bullying remains a prevalent disruptive behavior among junior high school students, severely impairing their psychological, relational, and academic functioning. This study aims to develop a reality counseling guidebook integrated with strengths and virtues character values to reduce bullying behavior among junior high school students, as well as to determine its feasibility and empirical effectiveness. The study implemented a Research and Development (R&D) framework utilizing the Analysis, Design, Development, Implementation, Evaluation (ADDIE) model. The trial participants comprised one subject-matter expert, one educational media expert, two guidance and counseling practitioners, and eight students identified as bullying perpetrators at SMP Negeri 55 Surabaya selected via purposive sampling. Data collection was carried out using expert validation instruments, practitioner acceptability rating scales, and a bullying behavior questionnaire administered across pretest and posttest stages. The validation results demonstrated high acceptability, yielding scores of 98.3% from the content expert, 90.4% from the media expert, and 93.75% from counseling practitioners, all categorized within the very good criteria. A paired sample t-test generated a significance value of 0.000 (p < 0.05), verifying that the reality counseling guidebook successfully reduced students' bullying tendencies. Consequently, this intervention module serves as a viable, systematic therapeutic guideline for guidance and counseling practitioners in mitigating school-based peer aggression. ABSTRAK Perilaku perundungan (bullying) masih marak terjadi di kalangan peserta didik jenjang sekolah menengah pertama serta membawa dampak negatif terhadap kondisi psikologis, sosial, dan akademik siswa. Penelitian ini bertujuan untuk mengembangkan buku panduan konseling realita berbasis nilai karakter kebajikan dan kekuatan (strengths and virtues) guna mereduksi perilaku bullying pada peserta didik di sekolah menengah pertama, serta menguji tingkat kelayakan dan efektivitasnya. Penelitian ini menggunakan pendekatan penelitian dan pengembangan (Research and Development) dengan menerapkan model Analysis, Design, Development, Implementation, Evaluation (ADDIE). Subjek uji coba terdiri atas satu orang ahli materi bimbingan dan konseling, satu orang ahli media pembelajaran, dua orang guru bimbingan dan konseling, serta delapan orang siswa teridentifikasi pelaku bullying di Sekolah Menengah Pertama (SMP) Negeri 55 Surabaya yang dipilih menggunakan teknik penarikan sampel bertujuan (purposive sampling). Pengumpulan data dilakukan melalui instrumen lembar validasi ahli, angket keterpakaian pengguna, serta kuesioner perilaku bullying yang diberikan pada tahap sebelum uji coba (pretest) dan sesudah uji coba (posttest). Hasil validasi menunjukkan tingkat kelayakan produk mencapai skor 98,3% dari ahli materi, 90,4% dari ahli media, dan 93,75% dari guru bimbingan dan konseling yang seluruhnya berada pada rentang kategori sangat baik. Hasil uji beda berpasangan (paired sample t-test) menghasilkan nilai signifikansi sebesar 0,000 (p < 0,05) yang membuktikan bahwa panduan yang dikembangkan efektif menurunkan frekuensi perilaku bullying secara signifikan. ]]>
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