The Princess of Convenient Plot Devices, Vol. 3 (manga) — Kazusa Yoneda

Princess Octavia finally meets Rust Byrne -- candidate number one for the role of (fake) boyfriend -- but is taken aback by his close resemblance to the entity who sent her into the world of The Noble King! Confronted with the memories of her reincarnation she'd been suppressing for so long, Octavia flees the room in terror. Though she pulls herself together with Klifford's support, Octavia is forced to put her search for a pseudolover aside when she becomes unwittingly entangled in a political trap -- as bait!