"You and your 'guess' are in love with each other! I don't need you to be a good girl. You can be sweet and chew on me a lot." Suzu is a university student who has started living alone in the flat where her family used to live after her parents remarried. At first, Suzu is optimistic about her life, saying that it is "easy", but gradually she starts to feel lonely. Suzu's heart is comforted by her landlord Kuta and her little brother Towa, who live downstairs. Spending happy days with her brothers brings a smile back to Suzu's face. Kuta's house is full of books by the novelist Ichijikunagi, whom Suzu loves dearly, and the two find something in common and start to become aware of each other...? Will Suzu be able to realise Kuta's true identity (Ichijikunagi)? Suzu also owes a debt of gratitude to Kuta...?