Beneath the Light (chapter) is the 10th overall chapter of Tegami Bachi Manga
Lag is just waking up after dreaming of the photo of the Empress—to which, Lag believes it looks like his mother. Lag remembers he is in Sylvette's house, as they are allowed to stay in Gauche's old room (at least until he returns).
Meanwhile, Sylvette is chasing Niche around the house, ordering her around with such things as brush your teeth, etc. Soon, at breakfast, Lag admits he is glad to stay at Sylvette's place, to which, she tells Lag to always make sure he comes back. Lag is trying Sylvette's soup, to which, he completely dislikes and remembers that Gauche had some back when Lag was delivered as a letter.
She also explains to Lag that the Empress is the ruler of the country, and is the object of worship for the church as the head. Aria later warns Lag, "If you get too close to the light...the shadows turn to deep darkness. That's what it means to aim for the position of Head Bee. Soon, Connor and Zazie ask Lag for help with a troublesome gaichuu; therefore, Lag goes and helps them.