Still recovering from the shock of his brother's sudden death, Pierrick accepted an invitation from his best friend Tessa to stay in her hometown house for a week to seek peace of mind. However, as soon as Pierrick arrived home, he found that Tessa's half-sister Marie was already living in the house, and Marie was also recuperating from her love frustration. The two were drunk on the first night they got along, and Tessa came unexpectedly the next day. The three of them experienced various ridiculous accidents and embarrassment when they lived together, and the secrets hidden in their hearts were slowly revealed...