I love my father-in-law more than my husband...

One year after her mother-in-law passed away, her husband, Ikki, and his wife, Towa, came to her parents' house because they were worried about their father-in-law, Toru, who was no longer able to hide his old age. Toru is a childhood friend of Ikki and has known Towa since childhood, and he thought of Towa as a daughter, but Towa had special feelings for Toru. This has been going on since a long time ago, when Towa was saved by Tooru, who was a firefighter. Then, he confesses his feelings to Tooru, who is now single, and boldly asks for a kiss, and as he becomes lustful, Tooru gradually becomes attracted to him as well...