The First Phone Call

"The First Phone Call" (初めての電話), labelled Volume 11.75, is a short story of You-Zitsu light novel series, available as a special booklet at the "Yōkoso Jitsuryoku Shijō Shugi no Fesuta e in Akihabara" (ようこそ実力至上主義のフェスタへ in Akihabara) event.