Kiyomasa Ōiwa, a relative of Anna Sasaki’s foster mother, belongs to the coastal Oiwa family and shares their rural seaside home with his wife, Setsu. Together, they welcome Anna for a summer stay, offering steadiness as she recuperates from health struggles. Kiyomasa’s pragmatic nature surfaces in his warnings about the marshland’s derelict mansion, where he jokingly blames lingering ghosts for its off-limits status—a mix of earnest caution and gentle humor that mirrors his approach to guiding Anna. Well-versed in the town’s heritage, he recounts the disused silo’s agricultural past while discouraging exploration of its unstable frame, blending history with practical advice. He actively nudges Anna toward community bonds, organizing outings like the Tanabata festival to ease her into local traditions. His subtle orchestration of social ties underscores a focus on connection, aiming to dissolve her isolation through shared experiences. Rooted in family duty and rural life, Kiyomasa’s own history remains peripheral, yet his unwavering support and calm demeanor anchor Anna’s environment, fostering incremental steps in her emotional recovery. His presence, unassuming yet intentional, weaves stability into the narrative’s fabric through steadfast encouragement and understated warmth.