Yamada-Kun and the Seven Witches Vol. 23-24 (manga)

Secret Wishes

With Hotaru in the hospital, Hikaru makes it his mission to secure a solid future for his twin brother at Suzaku High by pretending to be him and making tons of friends--if only he knew how! Yamada swoops in to offer a helping hand, but that assistance comes at a hefty price. Meanwhile, as Shiraishi continues her efforts to recover her lost memories of Yamada, their upcoming school trip might be the perfect opportunity for the couple to make some new ones! That is, if more witch investigations don't get in the way...