Mahiru Shiina is deserving of the moniker "Angel" because she is a divine beauty adored by all and an exceptional student and athlete. Shiina's next-door neighbor, Amane Fujimiya, inhabits a very different world than she does. Despite being neighbors, they have never even exchanged a word. However, Fujimiya breaks the tension between them by lending Shiina his umbrella after noticing her glumly sitting on a swing in the middle of a downpour. The following day, Fujimiya gets a cold, and Shiina wants to repay him for the umbrella by curing him. He secretly thanks her for being so courteous, thinking that this would be their only encounter. However, Shiina starts to prepare food and clean for Fujimiya because she is concerned about his lack of organization and nutrition. The odd couple spends time together in Fujimiya's apartment where they discuss their relationship's genuine nature and the soft feelings that come from it.