Someone explain me something. At first, I interpreted that last panel as Ayako dismissing Thoma as "like a brother", as in, barely noticing him, and l though the panel's sudden change of colour to be an indication that the mood changes from intimate to "whatever". However, Thoma complains in a latter page that "home became cold", so I really wonder if, rather than being a casual dismissal, Ayaka isn't in fact actually angry at Thoma but trying to hide it, and the sudden change in colour isn't a change in atmosphere from normal to downright cold.