Responses
According to google it means, "why, thank you" (⌒▽⌒)
Nao made up an abbrevation "Yasashiku Tenei ni Yukkuri" = YTY
Which means Gentle Careful Slowly (so in english it's like he was saying GCS abbrevation for Gently Careful Slowly)
In the last few pages Taichi says some weird word "yty", dk what means, someone can explain it please?(▰˘◡˘▰)