Fourth Chapter - Love scales

Summary1

 * This chapter introduces Sousa Kingdom's First Princess, Manaria Sousa.
 * Manaria is an exchange student and Claire's first love.
 * Manaria picks up on the bond between Claire and Rei and inserts herself between the two.
 * After an exchange with Rei, Manaria doubts the sincerity of Rei's "As long as Claire is Happy" mindset.
 * Minor misunderstandings accumulate between Claire and Rei causing a relationship crisis.
 * The Love Scales competition reveal many truths and closes the momentary distance between the two.
 * Claire begins showing dere to Rei while Rei begins to seriously consider Claire as a partner in a relationship.

1: Summary adapted from Jingle's Summary until Eleventh Chapter.