第 7 集: 在炸彈犯 Nanimon 威脅下，Touma 於 Chika 生日當天替 Masaru 代班

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It's Chika's birthday and Masaru must attend supplementary exams to save his grades. Unable to be by his sister's side on this day, he asks Touma to take his place. A Bomber Nanimon, however, threatens to ruin everything. (Source: Wikipedia)