Sometimes pretending to be someone else with 〜ことがある

三ツ星カラーズ » Volume 8 » Page 107

Sacchan and Kotoha notice Yui walking with a couple of her friends from school. The two decide to sneak and follow after them. Sacchan notices Yui doesn’t act quite the same with these friends as she does with Sacchan and Kotoha.

“Maybe it’s because in an undercover operation or something that she sometimes pretends to be a different person….”
“…that Yui at school might be trying to hide her true self.”