あなたは、永遠の愛を誓“え”ますか――？ 引きこもりの吸血鬼が、百年ぶりの東京で婚活＆伯父活!! ある出来事をきっかけに、永遠に変化のない【霧の森】に引きこもっていた吸血鬼・ヤスパース。愛犬も世話になった執事も亡くし、孤独に泣き濡れる彼の前にかつて森から【外】に出た妹・アビが現れ、百年ぶりに東京・清澄白河で暮らすことに。そこで不思議な女性・陽（はる）と出逢うのだが――!?
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