In the finale, Yusaku appears in the Summer Comiket for his very first time where Yuuto and Haruka are at. He introduced himself to Haruka who gives him a copy of hers and Yuuto's anime game while he also gives her a copy of his novel. At the end of the series, Yusaku attends Yuuto and Haruka's wedding. At the wedding, he is bumped by Shiina who he catches when she almost fell asking her if she's alright to which she replied "yes" while visualizing him as Yuuto for a second. Yusaku is thanked by Shiina who blushes showing a deep love interest in him.
- Yusaku is the second man Shiina has bumped into. (Yuuto being the first)
- Yusaku Igarasha is a person in real life and is the main Author of the Nogizaka Haruka no Himitsu series.