Takaaki Kouno is the central male protagonist throughout the To Heart 2 series and its OVA "ToHeart2 adplus". A second-year high school student living alone due to his parents' frequent overseas business commitments, his personality combines inherent kindness with pronounced shyness and social awkwardness around most girls. He comfortably interacts only with childhood friends Konomi Yuzuhara, whom he treats as a younger sister, and Tamaki Kousaka, who occupies an older sister role in his life. His closest male companion is Yuuji Kousaka. In "ToHeart2 adplus", Takaaki's home life involves assisting HMX-17c Silfa, a robot maid assigned to him. Her extreme shyness and social anxiety, especially during tasks like grocery shopping, require Takaaki’s patient guidance. One storyline centers on Silfa’s determined efforts to cook Haruka Yuzuhara’s special curry recipe for him, navigating competition from another robot, HMX-17b Milfa (alias Harumi Kouno). This highlights Takaaki’s supportive role in helping Silfa overcome obstacles. Unintentionally, Takaaki has earned a school reputation as a "gigolo" or "casanova". This stems from his friendly interactions with numerous female characters, despite all relationships being strictly platonic. Both classmates and teachers perpetuate the misunderstanding through teasing and envy, creating a recurring social burden. The second volume of "adplus" transitions to a summer setting, featuring Takaaki in swimsuit-related activities and photography. These scenarios emphasize lighthearted group dynamics consistent with his ensemble role.