Gimainara Honki ni Nattemo ii yone?

Masato Kyoki has always had a strained relationship with Yurin, the girl he considered his sister. After their parents disclose they are not biologically related, Yurin becomes so emotionally overwhelmed that she loses all memory of Masato. Following her hospital release, Masato worries about her condition and notices a drastic shift in their dynamic—Yurin now acts in a much more affectionate and forward manner toward him, a stark contrast to her previous coldness. Her sudden change in behavior leaves Masato confused and flustered, unsure how to respond to the unexpected intimacy.