Teiji and Lily's romance and Lucy's discovery of it

Teiji and Lily’s romance and Lucy’s discovery of it mark the collapse of the intimacy Lucy believed she shared with Teiji and the friendship she had built with Lily. The revelation comes not as a single confession but through a chain of observed gestures: an exchanged ice cream on Sado Island, a kiss at Tokyo Station, and Lily’s later admission that she had become caught up in the weekend. Lucy moves from suspicion to certainty, then tries to walk through the city that had once made room for her life with Teiji.

The relationship before the discovery

Lucy first encounters Teiji in Shinjuku after the string quartet she had played in with Mrs. Yamamoto disbands, leaving her Sundays unstructured. She has been wandering Tokyo by taking the Yamanote Line to a station and walking toward another. Although she does not describe herself as lonely, when she sees Teiji in the rain she cannot bear to leave him and return to being alone. Their early intimacy is formed in silence as much as conversation: they walk together, spend time at his uncle’s noodle shop, and share whole weekends in bed. Their favorite outings are warm, rainy nights, and Teiji teaches Lucy words for different kinds of rainfall. This history makes the later discovery more than the loss of a hoped-for romance. Lucy’s private map of Tokyo is already marked by the places and habits she shares with Teiji.

The ice-cream exchange on Sado Island

During the trip to Sado Island, Lucy happens upon Teiji and Lily sitting close together on a street bench, though they are not touching or looking at each other. Each has an ice cream. Lily gives Teiji her half-eaten cone while she wipes her fingers with his handkerchief; he watches her and licks the ice cream as he waits. The ease of the exchange strikes Lucy as more telling than an overt display might have been. Teiji accepts the cone without looking at it, and Lily uses his handkerchief without thanking him or apologizing. To Lucy, their unselfconscious familiarity means they are going to sleep together and that nothing will prevent it.

As she keeps watching, Lucy revises her conclusion. The pair are so comfortable in their silence that she decides they have already slept together. She cannot identify when it happened: she considers the beach, the clifftop where she had been unconscious, a hillside, or the night they shared an inn. The scene supplies no answer to that question. It shows instead how Lucy’s certainty takes shape from small physical details, while the timing and circumstances remain hidden from her. She walks away, tries unsuccessfully to cry in a public toilet, and then returns to Teiji and Lily.

Confirmation at Tokyo Station

On the ferry back, Lucy feels better while her arm is linked through Teiji’s. She lists what she has not seen: no kiss, touch, secret-sharing, flirtatious looks, or photograph of Lily taken by Teiji. She still trusts her instinct, but is willing to be proved wrong. At Tokyo Station, Lucy and Lily say goodbye to Teiji and take the Yamanote Line in opposite directions. When Lucy cannot see Lily on the expected part of the other platform, she returns to the place where she and Lily had parted from Teiji.

Watching from behind a newspaper kiosk, Lucy sees them face to face, with Lily’s foot between Teiji’s and their thighs nearly touching. They kiss. The kiss confirms the lovers’ relationship that the ice-cream exchange had allowed Lucy to infer, and changes her uncertainty into direct knowledge. One part of her wants to escape unnoticed; another makes her cry out. Teiji and Lily turn toward her, wide-eyed, and Lucy drops her newspaper and runs. The discovery is therefore also a public rupture: the private arrangement she has suspected becomes visible to all three of them at once.

Walking through the aftermath

For several days Lucy has no intention of speaking to either of them. On the fourth day, Lily calls repeatedly. Lucy leaves the phone ringing, wanting to know that Lily is trying to reach her even as she refuses to answer. Unable to remain in the apartment with the sound, Lucy sets out from Gotanda and walks counterclockwise along the Yamanote Line. As she passes through the city, memories of Teiji and Lily recur alongside other parts of her life: places associated with friends, work, shopping, and earlier journeys. The route becomes a way of moving through those memories without settling on one of them.

Lucy recalls the handkerchief and ice cream, and the pair’s desertion of her on the cliffs. At Shinjuku she thinks of Sachi, whose photographs she once imagined belonged to a distant past, and wonders whether Teiji had moved from Sachi to her and then from her to Lily with no pause between. Near Yoyogi Park, the song the three of them sang returns to her. She cries as she walks, then passes her office in Shibuya and imagines that she might return to work. By morning she has walked a marathon and circled Tokyo, arriving back at Gotanda. The return completes a physical loop without restoring the relationships that once gave the city its familiar shape.

Lily’s apology and Lucy’s refusal

Lily eventually comes to Lucy’s apartment, shaking and repeatedly raising a hand to her cheek. She says she had not wanted to hurt Lucy and had been caught up in the excitement of the weekend. She thinks she may have acted to hurt Andy, though he would never know. Lily is also uncertain whether she and Teiji have a future together, and offers to end the relationship if Lucy still wants their friendship.

Lucy refuses. Her answer closes the possibility Lily has offered, rather than settling the future of Teiji and Lily’s relationship. The sequence leaves Lucy with evidence of the affair but not a full account of its timing or meaning. Its force lies in that gap: ordinary gestures disclose an intimacy Lucy had not been allowed to see, while the later kiss makes denial impossible. Her walk around Tokyo gives the discovery a spatial form—a circuit through places crowded with remembered connections that nevertheless brings her back alone.