Sena Satou, who works as a medicinal researcher, finds herself lost in a different world - and she is not the only one! One day, after managing to start life as the medicine man 'Sena', she encounters a mysterious man. He is the demon king Delmatitidis, a man of immense beauty and strong magical powers, but sickly and weak. Sena's knowledge and experience in herbal medicine is recognised, and she becomes his personal apothecary, with whom he shares a special and unforgettable time. And so, before long, the two are drawn to each other. A drowning romance that will change the destiny of a genius former Licejo apothecary and a beautiful Demon King begins! “薬師”として活躍するセーナは異世界に迷い込んでしまった日本の製薬会社の研究員だった。 異世界で活躍しつつも孤独を感じていたある日、行き倒れの男性を助けたのだが、なんとその男性は“魔王デルマティティディス”だという！ 強く美しいながらも病弱な魔王の専属薬師となることになってしまい…？ 元リケジョの天才薬師と美しき魔王が織りなす、運命を変える溺愛ロマンス開幕！